diff --git a/integration/test_aaa_aardvark.py b/integration/test_aaa_aardvark.py
index 28ac4c412..e92403497 100644
--- a/integration/test_aaa_aardvark.py
+++ b/integration/test_aaa_aardvark.py
@@ -5,10 +5,6 @@
 # You can safely skip any of these tests, it'll just appear to "take
 # longer" to start the first test as the fixtures get built
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/integration/test_sftp.py b/integration/test_sftp.py
index 01ddfdf8a..2fdc7522e 100644
--- a/integration/test_sftp.py
+++ b/integration/test_sftp.py
@@ -10,10 +10,6 @@ These tests use Paramiko, rather than Twisted's Conch, because:
     2. Its API is much simpler to use.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/integration/test_streaming_logs.py b/integration/test_streaming_logs.py
index 036d30715..f70a42ead 100644
--- a/integration/test_streaming_logs.py
+++ b/integration/test_streaming_logs.py
@@ -1,12 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import (
-    print_function,
-    unicode_literals,
-    absolute_import,
-    division,
-)
 
 from future.utils import PY2
 if PY2:
diff --git a/misc/awesome_weird_stuff/boodlegrid.tac b/misc/awesome_weird_stuff/boodlegrid.tac
index f13427ceb..f03474756 100644
--- a/misc/awesome_weird_stuff/boodlegrid.tac
+++ b/misc/awesome_weird_stuff/boodlegrid.tac
@@ -1,6 +1,5 @@
 # -*- python -*-
 
-from __future__ import print_function
 
 """Monitor a Tahoe grid, by playing sounds in response to remote events.
 
diff --git a/misc/build_helpers/check-build.py b/misc/build_helpers/check-build.py
index 994ed650a..03fd53392 100644
--- a/misc/build_helpers/check-build.py
+++ b/misc/build_helpers/check-build.py
@@ -2,7 +2,6 @@
 
 # This helper script is used with the 'test-desert-island' Makefile target.
 
-from __future__ import print_function
 
 import sys
 
diff --git a/misc/build_helpers/gen-package-table.py b/misc/build_helpers/gen-package-table.py
index ebcfd1ecd..690e95739 100644
--- a/misc/build_helpers/gen-package-table.py
+++ b/misc/build_helpers/gen-package-table.py
@@ -2,7 +2,6 @@
 # This script generates a table of dependencies in HTML format on stdout.
 # It expects to be run in the tahoe-lafs-dep-eggs directory.
 
-from __future__ import print_function
 
 import re, os, sys
 import pkg_resources
diff --git a/misc/build_helpers/run-deprecations.py b/misc/build_helpers/run-deprecations.py
index 2ad335bd1..6338b7ccb 100644
--- a/misc/build_helpers/run-deprecations.py
+++ b/misc/build_helpers/run-deprecations.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 import sys, os, io, re
 from twisted.internet import reactor, protocol, task, defer
diff --git a/misc/build_helpers/test-osx-pkg.py b/misc/build_helpers/test-osx-pkg.py
index aaf7bb47a..6dc51eeaf 100644
--- a/misc/build_helpers/test-osx-pkg.py
+++ b/misc/build_helpers/test-osx-pkg.py
@@ -29,7 +29,6 @@
 # characteristic: 14.1.0 (/Applications/tahoe.app/support/lib/python2.7/site-packages)
 # pyasn1-modules: 0.0.5 (/Applications/tahoe.app/support/lib/python2.7/site-packages/pyasn1_modules-0.0.5-py2.7.egg)
 
-from __future__ import print_function
 
 import os, re, shutil, subprocess, sys, tempfile
 
diff --git a/misc/checkers/check_grid.py b/misc/checkers/check_grid.py
index 0a68ed899..189e5a260 100644
--- a/misc/checkers/check_grid.py
+++ b/misc/checkers/check_grid.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 """
 Test an existing Tahoe grid, both to see if the grid is still running and to
diff --git a/misc/coding_tools/check-debugging.py b/misc/coding_tools/check-debugging.py
index b920f5634..6bd54fee3 100755
--- a/misc/coding_tools/check-debugging.py
+++ b/misc/coding_tools/check-debugging.py
@@ -8,7 +8,6 @@ Runs on Python 3.
 Usage: ./check-debugging.py src
 """
 
-from __future__ import print_function
 
 import sys, re, os
 
diff --git a/misc/coding_tools/check-interfaces.py b/misc/coding_tools/check-interfaces.py
index 66bdf808f..d2657877a 100644
--- a/misc/coding_tools/check-interfaces.py
+++ b/misc/coding_tools/check-interfaces.py
@@ -4,7 +4,6 @@
 #
 #   bin/tahoe @misc/coding_tools/check-interfaces.py
 
-from __future__ import print_function
 
 import os, sys, re, platform
 
diff --git a/misc/coding_tools/check-umids.py b/misc/coding_tools/check-umids.py
index 345610f3e..1ef557cee 100644
--- a/misc/coding_tools/check-umids.py
+++ b/misc/coding_tools/check-umids.py
@@ -8,7 +8,6 @@ This runs on Python 3.
 
 # ./check-umids.py src
 
-from __future__ import print_function
 
 import sys, re, os
 
diff --git a/misc/coding_tools/graph-deps.py b/misc/coding_tools/graph-deps.py
index ad049093c..400f3912a 100755
--- a/misc/coding_tools/graph-deps.py
+++ b/misc/coding_tools/graph-deps.py
@@ -21,7 +21,6 @@
 # Install 'click' first. I run this with py2, but py3 might work too, if the
 # wheels can be built with py3.
 
-from __future__ import unicode_literals, print_function
 import os, sys, subprocess, json, tempfile, zipfile, re, itertools
 import email.parser
 from pprint import pprint
diff --git a/misc/coding_tools/make-canary-files.py b/misc/coding_tools/make-canary-files.py
index 89f274b38..018462892 100644
--- a/misc/coding_tools/make-canary-files.py
+++ b/misc/coding_tools/make-canary-files.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 """
 Given a list of nodeids and a 'convergence' file, create a bunch of files
diff --git a/misc/coding_tools/make_umid b/misc/coding_tools/make_umid
index 6b1759681..870ece1c6 100644
--- a/misc/coding_tools/make_umid
+++ b/misc/coding_tools/make_umid
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 """Create a short probably-unique string for use as a umid= argument in a
 Foolscap log() call, to make it easier to locate the source code that
diff --git a/misc/operations_helpers/cpu-watcher-poll.py b/misc/operations_helpers/cpu-watcher-poll.py
index 320dd8ad7..0ecf974c6 100644
--- a/misc/operations_helpers/cpu-watcher-poll.py
+++ b/misc/operations_helpers/cpu-watcher-poll.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 from foolscap import Tub, eventual
 from twisted.internet import reactor
diff --git a/misc/operations_helpers/cpu-watcher-subscribe.py b/misc/operations_helpers/cpu-watcher-subscribe.py
index 36a69cac7..ce486832f 100644
--- a/misc/operations_helpers/cpu-watcher-subscribe.py
+++ b/misc/operations_helpers/cpu-watcher-subscribe.py
@@ -1,6 +1,5 @@
 # -*- python -*-
 
-from __future__ import print_function
 
 from twisted.internet import reactor
 import sys
diff --git a/misc/operations_helpers/cpu-watcher.tac b/misc/operations_helpers/cpu-watcher.tac
index c50b51c61..140625d58 100644
--- a/misc/operations_helpers/cpu-watcher.tac
+++ b/misc/operations_helpers/cpu-watcher.tac
@@ -1,6 +1,5 @@
 # -*- python -*-
 
-from __future__ import print_function
 
 """
 # run this tool on a linux box in its own directory, with a file named
diff --git a/misc/operations_helpers/find-share-anomalies.py b/misc/operations_helpers/find-share-anomalies.py
index d689a8c99..e3826cc69 100644
--- a/misc/operations_helpers/find-share-anomalies.py
+++ b/misc/operations_helpers/find-share-anomalies.py
@@ -2,7 +2,6 @@
 
 # feed this the results of 'tahoe catalog-shares' for all servers
 
-from __future__ import print_function
 
 import sys
 
diff --git a/misc/operations_helpers/munin/tahoe_cpu_watcher b/misc/operations_helpers/munin/tahoe_cpu_watcher
index 8f2876792..ca7e40a32 100644
--- a/misc/operations_helpers/munin/tahoe_cpu_watcher
+++ b/misc/operations_helpers/munin/tahoe_cpu_watcher
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os, sys, re
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_diskleft b/misc/operations_helpers/munin/tahoe_diskleft
index d5ce04b1a..b08422575 100644
--- a/misc/operations_helpers/munin/tahoe_diskleft
+++ b/misc/operations_helpers/munin/tahoe_diskleft
@@ -5,7 +5,6 @@
 # is left on all disks across the grid. The plugin should be configured with
 # env_url= pointing at the diskwatcher.tac webport.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_disktotal b/misc/operations_helpers/munin/tahoe_disktotal
index b6d1a99e6..801eac164 100644
--- a/misc/operations_helpers/munin/tahoe_disktotal
+++ b/misc/operations_helpers/munin/tahoe_disktotal
@@ -6,7 +6,6 @@
 # used. The plugin should be configured with env_url= pointing at the
 # diskwatcher.tac webport.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_diskusage b/misc/operations_helpers/munin/tahoe_diskusage
index cc37af3df..7eadd8eeb 100644
--- a/misc/operations_helpers/munin/tahoe_diskusage
+++ b/misc/operations_helpers/munin/tahoe_diskusage
@@ -5,7 +5,6 @@
 # is being used per unit time. The plugin should be configured with env_url=
 # pointing at the diskwatcher.tac webport.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_diskused b/misc/operations_helpers/munin/tahoe_diskused
index 26303af86..151dc826e 100644
--- a/misc/operations_helpers/munin/tahoe_diskused
+++ b/misc/operations_helpers/munin/tahoe_diskused
@@ -5,7 +5,6 @@
 # used on all disks across the grid. The plugin should be configured with
 # env_url= pointing at the diskwatcher.tac webport.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_doomsday b/misc/operations_helpers/munin/tahoe_doomsday
index 5a87489c2..348b244fe 100644
--- a/misc/operations_helpers/munin/tahoe_doomsday
+++ b/misc/operations_helpers/munin/tahoe_doomsday
@@ -5,7 +5,6 @@
 # left before the grid fills up. The plugin should be configured with
 # env_url= pointing at the diskwatcher.tac webport.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_estimate_files b/misc/operations_helpers/munin/tahoe_estimate_files
index 1dda5affb..e6b6eff5d 100644
--- a/misc/operations_helpers/munin/tahoe_estimate_files
+++ b/misc/operations_helpers/munin/tahoe_estimate_files
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import sys, os.path
 
diff --git a/misc/operations_helpers/munin/tahoe_files b/misc/operations_helpers/munin/tahoe_files
index ec3ee5073..d951985a8 100644
--- a/misc/operations_helpers/munin/tahoe_files
+++ b/misc/operations_helpers/munin/tahoe_files
@@ -18,7 +18,6 @@
 #  env.basedir_NODE3 /path/to/node3
 #
 
-from __future__ import print_function
 
 import os, sys
 
diff --git a/misc/operations_helpers/munin/tahoe_helperstats_active b/misc/operations_helpers/munin/tahoe_helperstats_active
index ba1032acb..315a00886 100644
--- a/misc/operations_helpers/munin/tahoe_helperstats_active
+++ b/misc/operations_helpers/munin/tahoe_helperstats_active
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_helperstats_fetched b/misc/operations_helpers/munin/tahoe_helperstats_fetched
index 5f53bb82c..f9577427c 100644
--- a/misc/operations_helpers/munin/tahoe_helperstats_fetched
+++ b/misc/operations_helpers/munin/tahoe_helperstats_fetched
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_introstats b/misc/operations_helpers/munin/tahoe_introstats
index 0373c70e2..5dd07f62d 100644
--- a/misc/operations_helpers/munin/tahoe_introstats
+++ b/misc/operations_helpers/munin/tahoe_introstats
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_nodememory b/misc/operations_helpers/munin/tahoe_nodememory
index 061a50dc2..71463c031 100644
--- a/misc/operations_helpers/munin/tahoe_nodememory
+++ b/misc/operations_helpers/munin/tahoe_nodememory
@@ -4,7 +4,6 @@
 # by 'allmydata start', then extracts the amount of memory they consume (both
 # VmSize and VmRSS) from /proc
 
-from __future__ import print_function
 
 import os, sys, re
 
diff --git a/misc/operations_helpers/munin/tahoe_overhead b/misc/operations_helpers/munin/tahoe_overhead
index 40640d189..6a25bcd46 100644
--- a/misc/operations_helpers/munin/tahoe_overhead
+++ b/misc/operations_helpers/munin/tahoe_overhead
@@ -27,7 +27,6 @@
 # This plugin should be configured with env_diskwatcher_url= pointing at the
 # diskwatcher.tac webport, and env_deepsize_url= pointing at the PHP script.
 
-from __future__ import print_function
 
 import os, sys, urllib, json
 
diff --git a/misc/operations_helpers/munin/tahoe_rootdir_space b/misc/operations_helpers/munin/tahoe_rootdir_space
index 1f5709206..ca61ddb13 100644
--- a/misc/operations_helpers/munin/tahoe_rootdir_space
+++ b/misc/operations_helpers/munin/tahoe_rootdir_space
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_server_latency_ b/misc/operations_helpers/munin/tahoe_server_latency_
index c8930804c..4c9a79a7a 100644
--- a/misc/operations_helpers/munin/tahoe_server_latency_
+++ b/misc/operations_helpers/munin/tahoe_server_latency_
@@ -42,7 +42,6 @@
 # of course, these URLs must match the webports you have configured into the
 # storage nodes.
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_server_operations_ b/misc/operations_helpers/munin/tahoe_server_operations_
index 6156a7f48..cdf0409dd 100644
--- a/misc/operations_helpers/munin/tahoe_server_operations_
+++ b/misc/operations_helpers/munin/tahoe_server_operations_
@@ -32,7 +32,6 @@
 # of course, these URLs must match the webports you have configured into the
 # storage nodes.
 
-from __future__ import print_function
 
 import os, sys
 import urllib
diff --git a/misc/operations_helpers/munin/tahoe_spacetime b/misc/operations_helpers/munin/tahoe_spacetime
index 12b5121bf..e3a058851 100644
--- a/misc/operations_helpers/munin/tahoe_spacetime
+++ b/misc/operations_helpers/munin/tahoe_spacetime
@@ -5,7 +5,6 @@
 # then extrapolate to guess how many weeks/months/years of storage space we
 # have left, and output it to another munin graph
 
-from __future__ import print_function
 
 import sys, os, time
 import rrdtool
diff --git a/misc/operations_helpers/munin/tahoe_stats b/misc/operations_helpers/munin/tahoe_stats
index 03bf116f5..f94dd5b36 100644
--- a/misc/operations_helpers/munin/tahoe_stats
+++ b/misc/operations_helpers/munin/tahoe_stats
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import os
 import json
diff --git a/misc/operations_helpers/munin/tahoe_storagespace b/misc/operations_helpers/munin/tahoe_storagespace
index 73443b428..318283244 100644
--- a/misc/operations_helpers/munin/tahoe_storagespace
+++ b/misc/operations_helpers/munin/tahoe_storagespace
@@ -18,7 +18,6 @@
 # Allmydata-tahoe must be installed on the system where this plugin is used,
 # since it imports a utility module from allmydata.utils .
 
-from __future__ import print_function
 
 import os, sys
 import commands
diff --git a/misc/operations_helpers/provisioning/reliability.py b/misc/operations_helpers/provisioning/reliability.py
index fe274c875..c31e398e0 100644
--- a/misc/operations_helpers/provisioning/reliability.py
+++ b/misc/operations_helpers/provisioning/reliability.py
@@ -1,6 +1,5 @@
 #! /usr/bin/python
 
-from __future__ import print_function
 
 import math
 from allmydata.util import statistics
diff --git a/misc/operations_helpers/provisioning/test_provisioning.py b/misc/operations_helpers/provisioning/test_provisioning.py
index 2b71c8566..5d46f704e 100644
--- a/misc/operations_helpers/provisioning/test_provisioning.py
+++ b/misc/operations_helpers/provisioning/test_provisioning.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 import unittest
 from allmydata import provisioning
diff --git a/misc/operations_helpers/spacetime/diskwatcher.tac b/misc/operations_helpers/spacetime/diskwatcher.tac
index 0a43a468e..22c1f8747 100644
--- a/misc/operations_helpers/spacetime/diskwatcher.tac
+++ b/misc/operations_helpers/spacetime/diskwatcher.tac
@@ -1,6 +1,5 @@
 # -*- python -*-
 
-from __future__ import print_function
 
 """
 Run this tool with twistd in its own directory, with a file named 'urls.txt'
diff --git a/misc/simulators/bench_spans.py b/misc/simulators/bench_spans.py
index c696dac1e..6bc4f045e 100644
--- a/misc/simulators/bench_spans.py
+++ b/misc/simulators/bench_spans.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 """
 To use this, get a trace file such as this one:
diff --git a/misc/simulators/count_dirs.py b/misc/simulators/count_dirs.py
index 22eda8917..62045d1e2 100644
--- a/misc/simulators/count_dirs.py
+++ b/misc/simulators/count_dirs.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 """
 This tool estimates how much space would be consumed by a filetree into which
diff --git a/misc/simulators/hashbasedsig.py b/misc/simulators/hashbasedsig.py
index dbb9ca504..fff92b681 100644
--- a/misc/simulators/hashbasedsig.py
+++ b/misc/simulators/hashbasedsig.py
@@ -1,6 +1,5 @@
 #!python
 
-from __future__ import print_function
 
 # range of hash output lengths
 range_L_hash = [128]
diff --git a/misc/simulators/ringsim.py b/misc/simulators/ringsim.py
index e6616351c..889785bb4 100644
--- a/misc/simulators/ringsim.py
+++ b/misc/simulators/ringsim.py
@@ -4,7 +4,6 @@
 
 # import time
 
-from __future__ import print_function
 
 import math
 from hashlib import md5  # sha1, sha256
diff --git a/misc/simulators/simulate_load.py b/misc/simulators/simulate_load.py
index ed80ab842..989711207 100644
--- a/misc/simulators/simulate_load.py
+++ b/misc/simulators/simulate_load.py
@@ -2,7 +2,6 @@
 
 # WARNING. There is a bug in this script so that it does not simulate the actual Tahoe Two server selection algorithm that it was intended to simulate. See http://allmydata.org/trac/tahoe-lafs/ticket/302 (stop permuting peerlist, use SI as offset into ring instead?)
 
-from __future__ import print_function
 
 from past.builtins import cmp
 
diff --git a/misc/simulators/simulator.py b/misc/simulators/simulator.py
index ceeb05edf..b2f51b0e1 100644
--- a/misc/simulators/simulator.py
+++ b/misc/simulators/simulator.py
@@ -1,6 +1,5 @@
 #! /usr/bin/env python
 
-from __future__ import print_function
 
 import hashlib
 import os, random
diff --git a/misc/simulators/sizes.py b/misc/simulators/sizes.py
index eb5f3adbf..4b4f6d1fd 100644
--- a/misc/simulators/sizes.py
+++ b/misc/simulators/sizes.py
@@ -1,6 +1,5 @@
 #! /usr/bin/env python
 
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/misc/simulators/storage-overhead.py b/misc/simulators/storage-overhead.py
index 9959f5575..096c18fba 100644
--- a/misc/simulators/storage-overhead.py
+++ b/misc/simulators/storage-overhead.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 
 import sys, math
 from allmydata import uri, storage
diff --git a/pyinstaller.spec b/pyinstaller.spec
index 01b1ac4ac..5c24df430 100644
--- a/pyinstaller.spec
+++ b/pyinstaller.spec
@@ -1,6 +1,5 @@
 # -*- mode: python -*-
 
-from __future__ import print_function
 
 from distutils.sysconfig import get_python_lib
 import hashlib
diff --git a/src/allmydata/__main__.py b/src/allmydata/__main__.py
index 87f1f6522..972167b30 100644
--- a/src/allmydata/__main__.py
+++ b/src/allmydata/__main__.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/_monkeypatch.py b/src/allmydata/_monkeypatch.py
index da37fd979..520a4194a 100644
--- a/src/allmydata/_monkeypatch.py
+++ b/src/allmydata/_monkeypatch.py
@@ -4,10 +4,6 @@ Monkey-patching of third party libraries.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/blacklist.py b/src/allmydata/blacklist.py
index 43eb36cc6..a019ccb69 100644
--- a/src/allmydata/blacklist.py
+++ b/src/allmydata/blacklist.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/check_results.py b/src/allmydata/check_results.py
index 4f997b614..1dbf2f7d5 100644
--- a/src/allmydata/check_results.py
+++ b/src/allmydata/check_results.py
@@ -1,9 +1,5 @@
 """Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/codec.py b/src/allmydata/codec.py
index af375a117..b58ebae57 100644
--- a/src/allmydata/codec.py
+++ b/src/allmydata/codec.py
@@ -3,10 +3,6 @@ CRS encoding and decoding.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/crypto/__init__.py b/src/allmydata/crypto/__init__.py
index 04b8f0cc3..3ba70e605 100644
--- a/src/allmydata/crypto/__init__.py
+++ b/src/allmydata/crypto/__init__.py
@@ -9,10 +9,6 @@ objects that `cryptography` documents.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/crypto/aes.py b/src/allmydata/crypto/aes.py
index ad7cfcba4..6e1b93c03 100644
--- a/src/allmydata/crypto/aes.py
+++ b/src/allmydata/crypto/aes.py
@@ -9,10 +9,6 @@ objects that `cryptography` documents.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/crypto/error.py b/src/allmydata/crypto/error.py
index 153e48d33..ea3f78162 100644
--- a/src/allmydata/crypto/error.py
+++ b/src/allmydata/crypto/error.py
@@ -3,10 +3,6 @@ Exceptions raise by allmydata.crypto.* modules
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/crypto/util.py b/src/allmydata/crypto/util.py
index 8b8619e47..20f4bca85 100644
--- a/src/allmydata/crypto/util.py
+++ b/src/allmydata/crypto/util.py
@@ -3,10 +3,6 @@ Utilities used by allmydata.crypto modules
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/deep_stats.py b/src/allmydata/deep_stats.py
index bfb43ebae..a80abe508 100644
--- a/src/allmydata/deep_stats.py
+++ b/src/allmydata/deep_stats.py
@@ -2,10 +2,6 @@
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/dirnode.py b/src/allmydata/dirnode.py
index ccd045b05..67e44faf4 100644
--- a/src/allmydata/dirnode.py
+++ b/src/allmydata/dirnode.py
@@ -2,10 +2,6 @@
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/frontends/auth.py b/src/allmydata/frontends/auth.py
index b6f9c2b7e..6d58cf567 100644
--- a/src/allmydata/frontends/auth.py
+++ b/src/allmydata/frontends/auth.py
@@ -1,10 +1,6 @@
 """
 Authentication for frontends.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/frontends/sftpd.py b/src/allmydata/frontends/sftpd.py
index 7ef9a8820..e3c0eb674 100644
--- a/src/allmydata/frontends/sftpd.py
+++ b/src/allmydata/frontends/sftpd.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/hashtree.py b/src/allmydata/hashtree.py
index 57bdbd9a1..ca043f234 100644
--- a/src/allmydata/hashtree.py
+++ b/src/allmydata/hashtree.py
@@ -49,10 +49,6 @@ or eat  your children, but it might.  Use at your own risk.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/history.py b/src/allmydata/history.py
index 06a22ab5d..5629d7c43 100644
--- a/src/allmydata/history.py
+++ b/src/allmydata/history.py
@@ -1,9 +1,5 @@
 """Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/checker.py b/src/allmydata/immutable/checker.py
index 30abc68c6..0e8ba14d8 100644
--- a/src/allmydata/immutable/checker.py
+++ b/src/allmydata/immutable/checker.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/__init__.py b/src/allmydata/immutable/downloader/__init__.py
index 2d3d9e2a4..84d6b71f9 100644
--- a/src/allmydata/immutable/downloader/__init__.py
+++ b/src/allmydata/immutable/downloader/__init__.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/common.py b/src/allmydata/immutable/downloader/common.py
index 71430b0d7..e0d1fe3af 100644
--- a/src/allmydata/immutable/downloader/common.py
+++ b/src/allmydata/immutable/downloader/common.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/fetcher.py b/src/allmydata/immutable/downloader/fetcher.py
index 130bb93dc..ccffa4889 100644
--- a/src/allmydata/immutable/downloader/fetcher.py
+++ b/src/allmydata/immutable/downloader/fetcher.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/finder.py b/src/allmydata/immutable/downloader/finder.py
index 4f6d1aa14..1992e72c1 100644
--- a/src/allmydata/immutable/downloader/finder.py
+++ b/src/allmydata/immutable/downloader/finder.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/node.py b/src/allmydata/immutable/downloader/node.py
index 102d29a0a..3c69b4084 100644
--- a/src/allmydata/immutable/downloader/node.py
+++ b/src/allmydata/immutable/downloader/node.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/segmentation.py b/src/allmydata/immutable/downloader/segmentation.py
index 6d7cb7676..4691f2602 100644
--- a/src/allmydata/immutable/downloader/segmentation.py
+++ b/src/allmydata/immutable/downloader/segmentation.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/share.py b/src/allmydata/immutable/downloader/share.py
index 016f1c34d..02e8554d4 100644
--- a/src/allmydata/immutable/downloader/share.py
+++ b/src/allmydata/immutable/downloader/share.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/downloader/status.py b/src/allmydata/immutable/downloader/status.py
index 425f6893c..11b3e88a7 100644
--- a/src/allmydata/immutable/downloader/status.py
+++ b/src/allmydata/immutable/downloader/status.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/encode.py b/src/allmydata/immutable/encode.py
index 2414527ff..b838e71e1 100644
--- a/src/allmydata/immutable/encode.py
+++ b/src/allmydata/immutable/encode.py
@@ -4,10 +4,6 @@
 Ported to Python 3.
 """
 
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/filenode.py b/src/allmydata/immutable/filenode.py
index 6962c31a4..761e663dd 100644
--- a/src/allmydata/immutable/filenode.py
+++ b/src/allmydata/immutable/filenode.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/happiness_upload.py b/src/allmydata/immutable/happiness_upload.py
index 3e3eedbc9..2bc0016b0 100644
--- a/src/allmydata/immutable/happiness_upload.py
+++ b/src/allmydata/immutable/happiness_upload.py
@@ -4,10 +4,6 @@ on.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/literal.py b/src/allmydata/immutable/literal.py
index 544a205e1..1ae2743f8 100644
--- a/src/allmydata/immutable/literal.py
+++ b/src/allmydata/immutable/literal.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/offloaded.py b/src/allmydata/immutable/offloaded.py
index 8ce51782c..a98d3372b 100644
--- a/src/allmydata/immutable/offloaded.py
+++ b/src/allmydata/immutable/offloaded.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/immutable/repairer.py b/src/allmydata/immutable/repairer.py
index bccd8453d..87873369a 100644
--- a/src/allmydata/immutable/repairer.py
+++ b/src/allmydata/immutable/repairer.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/interfaces.py b/src/allmydata/interfaces.py
index 0f00c5417..7bfcc9a13 100644
--- a/src/allmydata/interfaces.py
+++ b/src/allmydata/interfaces.py
@@ -5,10 +5,6 @@ Ported to Python 3.
 
 Note that for RemoteInterfaces, the __remote_name__ needs to be a native string because of https://github.com/warner/foolscap/blob/43f4485a42c9c28e2c79d655b3a9e24d4e6360ca/src/foolscap/remoteinterface.py#L67
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2, native_str
 if PY2:
diff --git a/src/allmydata/introducer/__init__.py b/src/allmydata/introducer/__init__.py
index bfc960e05..d654f6c89 100644
--- a/src/allmydata/introducer/__init__.py
+++ b/src/allmydata/introducer/__init__.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/introducer/client.py b/src/allmydata/introducer/client.py
index a64596f0e..4c8abff60 100644
--- a/src/allmydata/introducer/client.py
+++ b/src/allmydata/introducer/client.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/introducer/common.py b/src/allmydata/introducer/common.py
index f6f70d861..21b16a599 100644
--- a/src/allmydata/introducer/common.py
+++ b/src/allmydata/introducer/common.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/introducer/interfaces.py b/src/allmydata/introducer/interfaces.py
index 24fd3945f..ca97b425f 100644
--- a/src/allmydata/introducer/interfaces.py
+++ b/src/allmydata/introducer/interfaces.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, native_str
 if PY2:
diff --git a/src/allmydata/monitor.py b/src/allmydata/monitor.py
index 1559a30d9..c2aae826e 100644
--- a/src/allmydata/monitor.py
+++ b/src/allmydata/monitor.py
@@ -3,10 +3,6 @@ Manage status of long-running operations.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/mutable/checker.py b/src/allmydata/mutable/checker.py
index 0899168c3..ee57e2ed9 100644
--- a/src/allmydata/mutable/checker.py
+++ b/src/allmydata/mutable/checker.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/mutable/layout.py b/src/allmydata/mutable/layout.py
index 8bb2f3083..9057745e7 100644
--- a/src/allmydata/mutable/layout.py
+++ b/src/allmydata/mutable/layout.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/mutable/publish.py b/src/allmydata/mutable/publish.py
index e57652467..9df1d20b2 100644
--- a/src/allmydata/mutable/publish.py
+++ b/src/allmydata/mutable/publish.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/mutable/repairer.py b/src/allmydata/mutable/repairer.py
index 23af02203..5c6537769 100644
--- a/src/allmydata/mutable/repairer.py
+++ b/src/allmydata/mutable/repairer.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/admin.py b/src/allmydata/scripts/admin.py
index 3acd52267..d1bd59600 100644
--- a/src/allmydata/scripts/admin.py
+++ b/src/allmydata/scripts/admin.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/backupdb.py b/src/allmydata/scripts/backupdb.py
index c7827e56e..21db88ee2 100644
--- a/src/allmydata/scripts/backupdb.py
+++ b/src/allmydata/scripts/backupdb.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/default_nodedir.py b/src/allmydata/scripts/default_nodedir.py
index 00924b8f9..89d13cd1b 100644
--- a/src/allmydata/scripts/default_nodedir.py
+++ b/src/allmydata/scripts/default_nodedir.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/slow_operation.py b/src/allmydata/scripts/slow_operation.py
index 3c23fb533..092e85823 100644
--- a/src/allmydata/scripts/slow_operation.py
+++ b/src/allmydata/scripts/slow_operation.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_add_alias.py b/src/allmydata/scripts/tahoe_add_alias.py
index 8476aeb28..e29d974f4 100644
--- a/src/allmydata/scripts/tahoe_add_alias.py
+++ b/src/allmydata/scripts/tahoe_add_alias.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_backup.py b/src/allmydata/scripts/tahoe_backup.py
index b574f16e8..058febb8c 100644
--- a/src/allmydata/scripts/tahoe_backup.py
+++ b/src/allmydata/scripts/tahoe_backup.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_check.py b/src/allmydata/scripts/tahoe_check.py
index 6bafe3d1a..d88d3689e 100644
--- a/src/allmydata/scripts/tahoe_check.py
+++ b/src/allmydata/scripts/tahoe_check.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_cp.py b/src/allmydata/scripts/tahoe_cp.py
index aae03291f..9ccbf2a05 100644
--- a/src/allmydata/scripts/tahoe_cp.py
+++ b/src/allmydata/scripts/tahoe_cp.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_get.py b/src/allmydata/scripts/tahoe_get.py
index 39f1686ce..cf0dd8afa 100644
--- a/src/allmydata/scripts/tahoe_get.py
+++ b/src/allmydata/scripts/tahoe_get.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_ls.py b/src/allmydata/scripts/tahoe_ls.py
index 5a7136d77..b20dec723 100644
--- a/src/allmydata/scripts/tahoe_ls.py
+++ b/src/allmydata/scripts/tahoe_ls.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_manifest.py b/src/allmydata/scripts/tahoe_manifest.py
index b55075eef..e1ee95ef6 100644
--- a/src/allmydata/scripts/tahoe_manifest.py
+++ b/src/allmydata/scripts/tahoe_manifest.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_mkdir.py b/src/allmydata/scripts/tahoe_mkdir.py
index 85fe12554..2bc35c391 100644
--- a/src/allmydata/scripts/tahoe_mkdir.py
+++ b/src/allmydata/scripts/tahoe_mkdir.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_mv.py b/src/allmydata/scripts/tahoe_mv.py
index d921047a8..bd1e4f810 100644
--- a/src/allmydata/scripts/tahoe_mv.py
+++ b/src/allmydata/scripts/tahoe_mv.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_run.py b/src/allmydata/scripts/tahoe_run.py
index eba5ae329..345f85815 100644
--- a/src/allmydata/scripts/tahoe_run.py
+++ b/src/allmydata/scripts/tahoe_run.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_status.py b/src/allmydata/scripts/tahoe_status.py
index 250bfdea3..5c8c6aee0 100644
--- a/src/allmydata/scripts/tahoe_status.py
+++ b/src/allmydata/scripts/tahoe_status.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_unlink.py b/src/allmydata/scripts/tahoe_unlink.py
index 5bdebb960..29da80811 100644
--- a/src/allmydata/scripts/tahoe_unlink.py
+++ b/src/allmydata/scripts/tahoe_unlink.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/scripts/tahoe_webopen.py b/src/allmydata/scripts/tahoe_webopen.py
index dbec31e87..2b16f09e1 100644
--- a/src/allmydata/scripts/tahoe_webopen.py
+++ b/src/allmydata/scripts/tahoe_webopen.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/common.py b/src/allmydata/storage/common.py
index f6d986f85..e9f5e4e5d 100644
--- a/src/allmydata/storage/common.py
+++ b/src/allmydata/storage/common.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/storage/crawler.py b/src/allmydata/storage/crawler.py
index 7516bc4e9..8a7304808 100644
--- a/src/allmydata/storage/crawler.py
+++ b/src/allmydata/storage/crawler.py
@@ -4,10 +4,6 @@ Crawl the storage server shares.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/storage/expirer.py b/src/allmydata/storage/expirer.py
index 55ab51843..bcff8aeeb 100644
--- a/src/allmydata/storage/expirer.py
+++ b/src/allmydata/storage/expirer.py
@@ -1,7 +1,3 @@
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/immutable.py b/src/allmydata/storage/immutable.py
index 0893513ae..fc696ff60 100644
--- a/src/allmydata/storage/immutable.py
+++ b/src/allmydata/storage/immutable.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2, bytes_to_native_str
 if PY2:
diff --git a/src/allmydata/storage/immutable_schema.py b/src/allmydata/storage/immutable_schema.py
index 40663b935..beb184700 100644
--- a/src/allmydata/storage/immutable_schema.py
+++ b/src/allmydata/storage/immutable_schema.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/lease.py b/src/allmydata/storage/lease.py
index c0d11abfd..ad21ce598 100644
--- a/src/allmydata/storage/lease.py
+++ b/src/allmydata/storage/lease.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/mutable.py b/src/allmydata/storage/mutable.py
index 51c3a3c8b..cb9116a21 100644
--- a/src/allmydata/storage/mutable.py
+++ b/src/allmydata/storage/mutable.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/mutable_schema.py b/src/allmydata/storage/mutable_schema.py
index 4be0d2137..b8530e0aa 100644
--- a/src/allmydata/storage/mutable_schema.py
+++ b/src/allmydata/storage/mutable_schema.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/storage/shares.py b/src/allmydata/storage/shares.py
index 59e7b1539..5fe2b106c 100644
--- a/src/allmydata/storage/shares.py
+++ b/src/allmydata/storage/shares.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/__init__.py b/src/allmydata/test/__init__.py
index 893aa15ce..14ec9b054 100644
--- a/src/allmydata/test/__init__.py
+++ b/src/allmydata/test/__init__.py
@@ -15,10 +15,6 @@ some side-effects which make things better when the test suite runs.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/common.py b/src/allmydata/test/cli/common.py
index ed066c6b6..45cafbec6 100644
--- a/src/allmydata/test/cli/common.py
+++ b/src/allmydata/test/cli/common.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_admin.py b/src/allmydata/test/cli/test_admin.py
index 0570467a5..d1e9263d0 100644
--- a/src/allmydata/test/cli/test_admin.py
+++ b/src/allmydata/test/cli/test_admin.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_alias.py b/src/allmydata/test/cli/test_alias.py
index a3ee595b8..025a7ae9d 100644
--- a/src/allmydata/test/cli/test_alias.py
+++ b/src/allmydata/test/cli/test_alias.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_backup.py b/src/allmydata/test/cli/test_backup.py
index df598b811..804817132 100644
--- a/src/allmydata/test/cli/test_backup.py
+++ b/src/allmydata/test/cli/test_backup.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_backupdb.py b/src/allmydata/test/cli/test_backupdb.py
index 665382dc8..ca18a4a74 100644
--- a/src/allmydata/test/cli/test_backupdb.py
+++ b/src/allmydata/test/cli/test_backupdb.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_check.py b/src/allmydata/test/cli/test_check.py
index d539f3ebe..24fd0d8e8 100644
--- a/src/allmydata/test/cli/test_check.py
+++ b/src/allmydata/test/cli/test_check.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_cli.py b/src/allmydata/test/cli/test_cli.py
index 72eb011d0..d7fde2742 100644
--- a/src/allmydata/test/cli/test_cli.py
+++ b/src/allmydata/test/cli/test_cli.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_cp.py b/src/allmydata/test/cli/test_cp.py
index fff50f331..5e8e411ad 100644
--- a/src/allmydata/test/cli/test_cp.py
+++ b/src/allmydata/test/cli/test_cp.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_create_alias.py b/src/allmydata/test/cli/test_create_alias.py
index 176bf7576..cb8526087 100644
--- a/src/allmydata/test/cli/test_create_alias.py
+++ b/src/allmydata/test/cli/test_create_alias.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_list.py b/src/allmydata/test/cli/test_list.py
index 1206579f1..141908987 100644
--- a/src/allmydata/test/cli/test_list.py
+++ b/src/allmydata/test/cli/test_list.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/test/cli/test_mv.py b/src/allmydata/test/cli/test_mv.py
index 0bb9ba369..cb998025d 100644
--- a/src/allmydata/test/cli/test_mv.py
+++ b/src/allmydata/test/cli/test_mv.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli/test_status.py b/src/allmydata/test/cli/test_status.py
index a015391e2..e8d2ca3c8 100644
--- a/src/allmydata/test/cli/test_status.py
+++ b/src/allmydata/test/cli/test_status.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/cli_node_api.py b/src/allmydata/test/cli_node_api.py
index c324d5565..e7d5e6600 100644
--- a/src/allmydata/test/cli_node_api.py
+++ b/src/allmydata/test/cli_node_api.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/common_util.py b/src/allmydata/test/common_util.py
index 2bf88ce20..12e5cec72 100644
--- a/src/allmydata/test/common_util.py
+++ b/src/allmydata/test/common_util.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2, PY3, bchr, binary_type
 from future.builtins import str as future_str
diff --git a/src/allmydata/test/common_web.py b/src/allmydata/test/common_web.py
index bd55a9fe9..e43474da1 100644
--- a/src/allmydata/test/common_web.py
+++ b/src/allmydata/test/common_web.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/matchers.py b/src/allmydata/test/matchers.py
index cc8bf47be..20edd88c2 100644
--- a/src/allmydata/test/matchers.py
+++ b/src/allmydata/test/matchers.py
@@ -3,10 +3,6 @@ Testtools-style matchers useful to the Tahoe-LAFS test suite.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_checker.py b/src/allmydata/test/mutable/test_checker.py
index 6d9145d68..8eaa6c845 100644
--- a/src/allmydata/test/mutable/test_checker.py
+++ b/src/allmydata/test/mutable/test_checker.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_datahandle.py b/src/allmydata/test/mutable/test_datahandle.py
index 7aabcd8e1..79536e7d1 100644
--- a/src/allmydata/test/mutable/test_datahandle.py
+++ b/src/allmydata/test/mutable/test_datahandle.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_different_encoding.py b/src/allmydata/test/mutable/test_different_encoding.py
index f1796d373..6bfc7e89a 100644
--- a/src/allmydata/test/mutable/test_different_encoding.py
+++ b/src/allmydata/test/mutable/test_different_encoding.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_exceptions.py b/src/allmydata/test/mutable/test_exceptions.py
index 23674d036..fa1c1a884 100644
--- a/src/allmydata/test/mutable/test_exceptions.py
+++ b/src/allmydata/test/mutable/test_exceptions.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_filehandle.py b/src/allmydata/test/mutable/test_filehandle.py
index 795f60654..1e6c61c68 100644
--- a/src/allmydata/test/mutable/test_filehandle.py
+++ b/src/allmydata/test/mutable/test_filehandle.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_filenode.py b/src/allmydata/test/mutable/test_filenode.py
index 6c00e4420..ca76be1b0 100644
--- a/src/allmydata/test/mutable/test_filenode.py
+++ b/src/allmydata/test/mutable/test_filenode.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_interoperability.py b/src/allmydata/test/mutable/test_interoperability.py
index 496da1d2a..745baca97 100644
--- a/src/allmydata/test/mutable/test_interoperability.py
+++ b/src/allmydata/test/mutable/test_interoperability.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_multiple_encodings.py b/src/allmydata/test/mutable/test_multiple_encodings.py
index 2291b60d8..8ccfd387e 100644
--- a/src/allmydata/test/mutable/test_multiple_encodings.py
+++ b/src/allmydata/test/mutable/test_multiple_encodings.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_multiple_versions.py b/src/allmydata/test/mutable/test_multiple_versions.py
index c9b7e71df..c9c1f15aa 100644
--- a/src/allmydata/test/mutable/test_multiple_versions.py
+++ b/src/allmydata/test/mutable/test_multiple_versions.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_problems.py b/src/allmydata/test/mutable/test_problems.py
index d3a779905..6f22c02c2 100644
--- a/src/allmydata/test/mutable/test_problems.py
+++ b/src/allmydata/test/mutable/test_problems.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_repair.py b/src/allmydata/test/mutable/test_repair.py
index deddb8d92..f4ae53e13 100644
--- a/src/allmydata/test/mutable/test_repair.py
+++ b/src/allmydata/test/mutable/test_repair.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_roundtrip.py b/src/allmydata/test/mutable/test_roundtrip.py
index 96ecdf640..eddd7f3df 100644
--- a/src/allmydata/test/mutable/test_roundtrip.py
+++ b/src/allmydata/test/mutable/test_roundtrip.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_servermap.py b/src/allmydata/test/mutable/test_servermap.py
index 505d31e73..b3a247015 100644
--- a/src/allmydata/test/mutable/test_servermap.py
+++ b/src/allmydata/test/mutable/test_servermap.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/test_update.py b/src/allmydata/test/mutable/test_update.py
index 1c91590bd..02fca24b2 100644
--- a/src/allmydata/test/mutable/test_update.py
+++ b/src/allmydata/test/mutable/test_update.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/mutable/util.py b/src/allmydata/test/mutable/util.py
index bed350652..336b8bfd7 100644
--- a/src/allmydata/test/mutable/util.py
+++ b/src/allmydata/test/mutable/util.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2, bchr
 if PY2:
diff --git a/src/allmydata/test/storage_plugin.py b/src/allmydata/test/storage_plugin.py
index d3f1ec7c9..cb18f4dda 100644
--- a/src/allmydata/test/storage_plugin.py
+++ b/src/allmydata/test/storage_plugin.py
@@ -4,10 +4,6 @@ functionality.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/strategies.py b/src/allmydata/test/strategies.py
index 35b9766b0..92290203e 100644
--- a/src/allmydata/test/strategies.py
+++ b/src/allmydata/test/strategies.py
@@ -3,10 +3,6 @@ Hypothesis strategies use for testing Tahoe-LAFS.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_abbreviate.py b/src/allmydata/test/test_abbreviate.py
index 3ef1e96a6..cefa7f23f 100644
--- a/src/allmydata/test/test_abbreviate.py
+++ b/src/allmydata/test/test_abbreviate.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.abbreviate.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_base32.py b/src/allmydata/test/test_base32.py
index 0b9a018b9..236560599 100644
--- a/src/allmydata/test/test_base32.py
+++ b/src/allmydata/test/test_base32.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.base32.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_base62.py b/src/allmydata/test/test_base62.py
index 8bbb6dfeb..258ca62ec 100644
--- a/src/allmydata/test/test_base62.py
+++ b/src/allmydata/test/test_base62.py
@@ -4,10 +4,6 @@ Tests for allmydata.util.base62.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_checker.py b/src/allmydata/test/test_checker.py
index 3d64d4976..a33fc23b5 100644
--- a/src/allmydata/test/test_checker.py
+++ b/src/allmydata/test/test_checker.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_codec.py b/src/allmydata/test/test_codec.py
index ee64e2bf2..efb575cd7 100644
--- a/src/allmydata/test/test_codec.py
+++ b/src/allmydata/test/test_codec.py
@@ -3,10 +3,6 @@ Tests for allmydata.codec.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_common_util.py b/src/allmydata/test/test_common_util.py
index c141adc8d..b1c698208 100644
--- a/src/allmydata/test/test_common_util.py
+++ b/src/allmydata/test/test_common_util.py
@@ -1,10 +1,6 @@
 """
 This module has been ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_configutil.py b/src/allmydata/test/test_configutil.py
index 1b8fb5029..d1931479f 100644
--- a/src/allmydata/test/test_configutil.py
+++ b/src/allmydata/test/test_configutil.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.configutil.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_connections.py b/src/allmydata/test/test_connections.py
index 5816afdab..3cf8ed937 100644
--- a/src/allmydata/test/test_connections.py
+++ b/src/allmydata/test/test_connections.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_consumer.py b/src/allmydata/test/test_consumer.py
index ee1908ba7..9465b42cd 100644
--- a/src/allmydata/test/test_consumer.py
+++ b/src/allmydata/test/test_consumer.py
@@ -4,10 +4,6 @@ Tests for allmydata.util.consumer.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_crawler.py b/src/allmydata/test/test_crawler.py
index 80d732986..02181dd55 100644
--- a/src/allmydata/test/test_crawler.py
+++ b/src/allmydata/test/test_crawler.py
@@ -4,10 +4,6 @@ Tests for allmydata.storage.crawler.
 Ported to Python 3.
 """
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/test/test_crypto.py b/src/allmydata/test/test_crypto.py
index b7c84b447..2114b053b 100644
--- a/src/allmydata/test/test_crypto.py
+++ b/src/allmydata/test/test_crypto.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_deepcheck.py b/src/allmydata/test/test_deepcheck.py
index 652e51ea5..8af75bcd0 100644
--- a/src/allmydata/test/test_deepcheck.py
+++ b/src/allmydata/test/test_deepcheck.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 # Python 2 compatibility
 # Can't use `builtins.str` because something deep in Twisted callbacks ends up repr'ing
diff --git a/src/allmydata/test/test_dirnode.py b/src/allmydata/test/test_dirnode.py
index 2319e3ce1..2349f3c4e 100644
--- a/src/allmydata/test/test_dirnode.py
+++ b/src/allmydata/test/test_dirnode.py
@@ -2,10 +2,6 @@
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from past.builtins import long
 
diff --git a/src/allmydata/test/test_encode.py b/src/allmydata/test/test_encode.py
index 028a988cb..33c946010 100644
--- a/src/allmydata/test/test_encode.py
+++ b/src/allmydata/test/test_encode.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_encodingutil.py b/src/allmydata/test/test_encodingutil.py
index 062c64ba1..b218b0bd9 100644
--- a/src/allmydata/test/test_encodingutil.py
+++ b/src/allmydata/test/test_encodingutil.py
@@ -1,7 +1,3 @@
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2, PY3
 if PY2:
diff --git a/src/allmydata/test/test_filenode.py b/src/allmydata/test/test_filenode.py
index a8f0e2431..2bf1edd6c 100644
--- a/src/allmydata/test/test_filenode.py
+++ b/src/allmydata/test/test_filenode.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_happiness.py b/src/allmydata/test/test_happiness.py
index 9ff36ef26..8f21b1363 100644
--- a/src/allmydata/test/test_happiness.py
+++ b/src/allmydata/test/test_happiness.py
@@ -6,10 +6,6 @@ allmydata.util.happinessutil.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_hashutil.py b/src/allmydata/test/test_hashutil.py
index 1efa2d9db..d64fb8abc 100644
--- a/src/allmydata/test/test_hashutil.py
+++ b/src/allmydata/test/test_hashutil.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.hashutil.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_humanreadable.py b/src/allmydata/test/test_humanreadable.py
index 94de8f6be..b74277448 100644
--- a/src/allmydata/test/test_humanreadable.py
+++ b/src/allmydata/test/test_humanreadable.py
@@ -4,10 +4,6 @@ Tests for allmydata.util.humanreadable.
 This module has been ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_hung_server.py b/src/allmydata/test/test_hung_server.py
index 162b1d79c..24e2810e0 100644
--- a/src/allmydata/test/test_hung_server.py
+++ b/src/allmydata/test/test_hung_server.py
@@ -3,10 +3,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_i2p_provider.py b/src/allmydata/test/test_i2p_provider.py
index 072b17647..8628aeed6 100644
--- a/src/allmydata/test/test_i2p_provider.py
+++ b/src/allmydata/test/test_i2p_provider.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_immutable.py b/src/allmydata/test/test_immutable.py
index 12f2012e0..303485831 100644
--- a/src/allmydata/test/test_immutable.py
+++ b/src/allmydata/test/test_immutable.py
@@ -1,10 +1,6 @@
 """
 This module has been ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_introducer.py b/src/allmydata/test/test_introducer.py
index 0475d3f6c..2fd6ff69b 100644
--- a/src/allmydata/test/test_introducer.py
+++ b/src/allmydata/test/test_introducer.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_json_metadata.py b/src/allmydata/test/test_json_metadata.py
index a0cb9c142..822d37925 100644
--- a/src/allmydata/test/test_json_metadata.py
+++ b/src/allmydata/test/test_json_metadata.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_log.py b/src/allmydata/test/test_log.py
index bf079aaeb..c3472cad8 100644
--- a/src/allmydata/test/test_log.py
+++ b/src/allmydata/test/test_log.py
@@ -4,10 +4,6 @@ Tests for allmydata.util.log.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2, native_str
 if PY2:
diff --git a/src/allmydata/test/test_monitor.py b/src/allmydata/test/test_monitor.py
index 7010da73a..bede3e001 100644
--- a/src/allmydata/test/test_monitor.py
+++ b/src/allmydata/test/test_monitor.py
@@ -2,10 +2,6 @@
 Tests for allmydata.monitor.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_multi_introducers.py b/src/allmydata/test/test_multi_introducers.py
index 2b0879530..7f42177ab 100644
--- a/src/allmydata/test/test_multi_introducers.py
+++ b/src/allmydata/test/test_multi_introducers.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_netstring.py b/src/allmydata/test/test_netstring.py
index d5ff379cd..54cc16df8 100644
--- a/src/allmydata/test/test_netstring.py
+++ b/src/allmydata/test/test_netstring.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.netstring.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_no_network.py b/src/allmydata/test/test_no_network.py
index b1aa1350a..2d6bdb896 100644
--- a/src/allmydata/test/test_no_network.py
+++ b/src/allmydata/test/test_no_network.py
@@ -3,10 +3,6 @@ Test the NoNetworkGrid test harness.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_observer.py b/src/allmydata/test/test_observer.py
index 134876be3..ddc58b074 100644
--- a/src/allmydata/test/test_observer.py
+++ b/src/allmydata/test/test_observer.py
@@ -4,10 +4,6 @@ Tests for allmydata.util.observer.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_openmetrics.py b/src/allmydata/test/test_openmetrics.py
index 66cbc7dec..2199bcc5f 100644
--- a/src/allmydata/test/test_openmetrics.py
+++ b/src/allmydata/test/test_openmetrics.py
@@ -4,10 +4,6 @@ Tests for ``/statistics?t=openmetrics``.
 Ported to Python 3.
 """
 
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 
diff --git a/src/allmydata/test/test_python2_regressions.py b/src/allmydata/test/test_python2_regressions.py
index c641d2dba..9a12f0374 100644
--- a/src/allmydata/test/test_python2_regressions.py
+++ b/src/allmydata/test/test_python2_regressions.py
@@ -2,10 +2,6 @@
 Tests to check for Python2 regressions
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_repairer.py b/src/allmydata/test/test_repairer.py
index 8545b1cf4..280825775 100644
--- a/src/allmydata/test/test_repairer.py
+++ b/src/allmydata/test/test_repairer.py
@@ -2,10 +2,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_runner.py b/src/allmydata/test/test_runner.py
index a84fa28f8..b784b2c61 100644
--- a/src/allmydata/test/test_runner.py
+++ b/src/allmydata/test/test_runner.py
@@ -2,13 +2,6 @@
 Ported to Python 3
 """
 
-from __future__ import (
-    absolute_import,
-)
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
-
 from future.utils import PY2
 if PY2:
     from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
diff --git a/src/allmydata/test/test_sftp.py b/src/allmydata/test/test_sftp.py
index 2214e4e5b..d1902b9ee 100644
--- a/src/allmydata/test/test_sftp.py
+++ b/src/allmydata/test/test_sftp.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_spans.py b/src/allmydata/test/test_spans.py
index 281f916c4..e1ac9a229 100644
--- a/src/allmydata/test/test_spans.py
+++ b/src/allmydata/test/test_spans.py
@@ -2,10 +2,6 @@
 Tests for allmydata.util.spans.
 """
 
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_statistics.py b/src/allmydata/test/test_statistics.py
index 476f0a084..ce91e4efb 100644
--- a/src/allmydata/test/test_statistics.py
+++ b/src/allmydata/test/test_statistics.py
@@ -3,10 +3,6 @@ Tests for allmydata.util.statistics.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_stats.py b/src/allmydata/test/test_stats.py
index 6fe690f1f..8f02640e0 100644
--- a/src/allmydata/test/test_stats.py
+++ b/src/allmydata/test/test_stats.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_storage_web.py b/src/allmydata/test/test_storage_web.py
index b47c93849..10249c83a 100644
--- a/src/allmydata/test/test_storage_web.py
+++ b/src/allmydata/test/test_storage_web.py
@@ -4,10 +4,6 @@ Tests for twisted.storage that uses Web APIs.
 Partially ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_time_format.py b/src/allmydata/test/test_time_format.py
index f83a6a53c..2f10a3ea9 100644
--- a/src/allmydata/test/test_time_format.py
+++ b/src/allmydata/test/test_time_format.py
@@ -1,10 +1,6 @@
 """
 Tests for allmydata.util.time_format.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_upload.py b/src/allmydata/test/test_upload.py
index 18192de6c..f9541e946 100644
--- a/src/allmydata/test/test_upload.py
+++ b/src/allmydata/test/test_upload.py
@@ -3,10 +3,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_uri.py b/src/allmydata/test/test_uri.py
index 748a0f6ef..7f4908da6 100644
--- a/src/allmydata/test/test_uri.py
+++ b/src/allmydata/test/test_uri.py
@@ -4,10 +4,6 @@ Tests for allmydata.uri.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/test_util.py b/src/allmydata/test/test_util.py
index d3a36a756..0b4917381 100644
--- a/src/allmydata/test/test_util.py
+++ b/src/allmydata/test/test_util.py
@@ -2,10 +2,6 @@
 Ported to Python3.
 """
 
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/common.py b/src/allmydata/test/web/common.py
index fbf7b015f..be7fe0af1 100644
--- a/src/allmydata/test/web/common.py
+++ b/src/allmydata/test/web/common.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/matchers.py b/src/allmydata/test/web/matchers.py
index f764da79d..f6d52aaad 100644
--- a/src/allmydata/test/web/matchers.py
+++ b/src/allmydata/test/web/matchers.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_common.py b/src/allmydata/test/web/test_common.py
index 84ab5cab2..6c19a5b78 100644
--- a/src/allmydata/test/web/test_common.py
+++ b/src/allmydata/test/web/test_common.py
@@ -3,10 +3,6 @@ Tests for ``allmydata.web.common``.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_grid.py b/src/allmydata/test/web/test_grid.py
index 1ebe3a90f..0a7c913c0 100644
--- a/src/allmydata/test/web/test_grid.py
+++ b/src/allmydata/test/web/test_grid.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_introducer.py b/src/allmydata/test/web/test_introducer.py
index 69309d35b..d21a663f7 100644
--- a/src/allmydata/test/web/test_introducer.py
+++ b/src/allmydata/test/web/test_introducer.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_logs.py b/src/allmydata/test/web/test_logs.py
index a8b479a97..093503265 100644
--- a/src/allmydata/test/web/test_logs.py
+++ b/src/allmydata/test/web/test_logs.py
@@ -4,13 +4,6 @@ Tests for ``allmydata.web.logs``.
 Ported to Python 3.
 """
 
-from __future__ import (
-    print_function,
-    unicode_literals,
-    absolute_import,
-    division,
-)
-
 from future.utils import PY2
 if PY2:
     from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
diff --git a/src/allmydata/test/web/test_private.py b/src/allmydata/test/web/test_private.py
index b426b4d93..5652e8008 100644
--- a/src/allmydata/test/web/test_private.py
+++ b/src/allmydata/test/web/test_private.py
@@ -4,13 +4,6 @@ Tests for ``allmydata.web.private``.
 Ported to Python 3.
 """
 
-from __future__ import (
-    print_function,
-    unicode_literals,
-    absolute_import,
-    division,
-)
-
 from future.utils import PY2
 if PY2:
     from future.builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
diff --git a/src/allmydata/test/web/test_root.py b/src/allmydata/test/web/test_root.py
index 228b8e449..e810f9a14 100644
--- a/src/allmydata/test/web/test_root.py
+++ b/src/allmydata/test/web/test_root.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_status.py b/src/allmydata/test/web/test_status.py
index 414925446..c46ac4500 100644
--- a/src/allmydata/test/web/test_status.py
+++ b/src/allmydata/test/web/test_status.py
@@ -3,10 +3,6 @@ Tests for ```allmydata.web.status```.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/test/web/test_util.py b/src/allmydata/test/web/test_util.py
index c536dc9f1..5afe884b0 100644
--- a/src/allmydata/test/web/test_util.py
+++ b/src/allmydata/test/web/test_util.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/unknown.py b/src/allmydata/unknown.py
index 060696293..bfb56496d 100644
--- a/src/allmydata/unknown.py
+++ b/src/allmydata/unknown.py
@@ -1,9 +1,5 @@
 """Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/abbreviate.py b/src/allmydata/util/abbreviate.py
index f895c3727..e775813bd 100644
--- a/src/allmydata/util/abbreviate.py
+++ b/src/allmydata/util/abbreviate.py
@@ -3,10 +3,6 @@ Convert timestamps to abbreviated English text.
 
 Ported to Python 3.
 """
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/assertutil.py b/src/allmydata/util/assertutil.py
index ed4b8599f..2088f505c 100644
--- a/src/allmydata/util/assertutil.py
+++ b/src/allmydata/util/assertutil.py
@@ -7,10 +7,6 @@ have tests.
 Ported to Python 3.
 """
 
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/base62.py b/src/allmydata/util/base62.py
index 964baff34..dcde36562 100644
--- a/src/allmydata/util/base62.py
+++ b/src/allmydata/util/base62.py
@@ -3,10 +3,6 @@ Base62 encoding.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/configutil.py b/src/allmydata/util/configutil.py
index 74b0c714a..749f6d7d7 100644
--- a/src/allmydata/util/configutil.py
+++ b/src/allmydata/util/configutil.py
@@ -5,10 +5,6 @@ Configuration is returned as Unicode strings.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/consumer.py b/src/allmydata/util/consumer.py
index 3de82974d..cd73119fe 100644
--- a/src/allmydata/util/consumer.py
+++ b/src/allmydata/util/consumer.py
@@ -4,10 +4,6 @@ a filenode's read() method. See download_to_data() for an example of its use.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/dbutil.py b/src/allmydata/util/dbutil.py
index 45e59cf00..ac7ddbfeb 100644
--- a/src/allmydata/util/dbutil.py
+++ b/src/allmydata/util/dbutil.py
@@ -6,10 +6,6 @@ Test coverage currently provided by test_backupdb.py.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/encodingutil.py b/src/allmydata/util/encodingutil.py
index 5e28f59fe..d13011dd2 100644
--- a/src/allmydata/util/encodingutil.py
+++ b/src/allmydata/util/encodingutil.py
@@ -7,10 +7,6 @@ Ported to Python 3.
 Once Python 2 support is dropped, most of this module will obsolete, since
 Unicode is the default everywhere in Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2, PY3, native_str
 from future.builtins import str as future_str
diff --git a/src/allmydata/util/fileutil.py b/src/allmydata/util/fileutil.py
index e40e06180..0df3781b5 100644
--- a/src/allmydata/util/fileutil.py
+++ b/src/allmydata/util/fileutil.py
@@ -4,10 +4,6 @@ Ported to Python3.
 Futz with files like a pro.
 """
 
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/gcutil.py b/src/allmydata/util/gcutil.py
index 33f1f64f5..9eed8b1f4 100644
--- a/src/allmydata/util/gcutil.py
+++ b/src/allmydata/util/gcutil.py
@@ -10,10 +10,6 @@ Helpers for managing garbage collection.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/happinessutil.py b/src/allmydata/util/happinessutil.py
index 9f2617a5e..7f5d0f8a7 100644
--- a/src/allmydata/util/happinessutil.py
+++ b/src/allmydata/util/happinessutil.py
@@ -4,10 +4,6 @@ reporting it in messages.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/hashutil.py b/src/allmydata/util/hashutil.py
index 8525dd95e..579f55d88 100644
--- a/src/allmydata/util/hashutil.py
+++ b/src/allmydata/util/hashutil.py
@@ -3,10 +3,6 @@ Hashing utilities.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/humanreadable.py b/src/allmydata/util/humanreadable.py
index 60ac57083..2eaa7c79a 100644
--- a/src/allmydata/util/humanreadable.py
+++ b/src/allmydata/util/humanreadable.py
@@ -4,10 +4,6 @@ Utilities for turning objects into human-readable strings.
 This module has been ported to Python 3.
 """
 
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/idlib.py b/src/allmydata/util/idlib.py
index eafcbc388..c74f11599 100644
--- a/src/allmydata/util/idlib.py
+++ b/src/allmydata/util/idlib.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/jsonbytes.py b/src/allmydata/util/jsonbytes.py
index ea95bb5b8..24c8f3311 100644
--- a/src/allmydata/util/jsonbytes.py
+++ b/src/allmydata/util/jsonbytes.py
@@ -4,10 +4,6 @@ A JSON encoder than can serialize bytes.
 Ported to Python 3.
 """
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/log.py b/src/allmydata/util/log.py
index b442d30bb..afd612d7a 100644
--- a/src/allmydata/util/log.py
+++ b/src/allmydata/util/log.py
@@ -3,10 +3,6 @@ Logging utilities.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/mathutil.py b/src/allmydata/util/mathutil.py
index 42863c30e..a6a58e834 100644
--- a/src/allmydata/util/mathutil.py
+++ b/src/allmydata/util/mathutil.py
@@ -6,10 +6,6 @@ Backwards compatibility for direct imports.
 Ported to Python 3.
 """
 
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/netstring.py b/src/allmydata/util/netstring.py
index 423b8665b..23d8492ab 100644
--- a/src/allmydata/util/netstring.py
+++ b/src/allmydata/util/netstring.py
@@ -3,10 +3,6 @@ Netstring encoding and decoding.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/observer.py b/src/allmydata/util/observer.py
index 4a39fe014..b753d51ad 100644
--- a/src/allmydata/util/observer.py
+++ b/src/allmydata/util/observer.py
@@ -4,10 +4,6 @@ Observer for Twisted code.
 Ported to Python 3.
 """
 
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/rrefutil.py b/src/allmydata/util/rrefutil.py
index f39890ff1..1fb757f34 100644
--- a/src/allmydata/util/rrefutil.py
+++ b/src/allmydata/util/rrefutil.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/spans.py b/src/allmydata/util/spans.py
index 81e14c0fb..4ddc67704 100644
--- a/src/allmydata/util/spans.py
+++ b/src/allmydata/util/spans.py
@@ -1,7 +1,3 @@
-from __future__ import print_function
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/statistics.py b/src/allmydata/util/statistics.py
index a517751d6..35a7216a2 100644
--- a/src/allmydata/util/statistics.py
+++ b/src/allmydata/util/statistics.py
@@ -11,10 +11,6 @@ Ported to Python 3.
 # Transitive Grace Period Public License, version 1 or later.
 
 
-from __future__ import unicode_literals
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/time_format.py b/src/allmydata/util/time_format.py
index ff267485e..af98bf1d2 100644
--- a/src/allmydata/util/time_format.py
+++ b/src/allmydata/util/time_format.py
@@ -4,10 +4,6 @@ Time formatting utilities.
 ISO-8601:
 http://www.cl.cam.ac.uk/~mgk25/iso-time.html
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/util/yamlutil.py b/src/allmydata/util/yamlutil.py
index fd9fc73e2..eae1f8a6e 100644
--- a/src/allmydata/util/yamlutil.py
+++ b/src/allmydata/util/yamlutil.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/check_results.py b/src/allmydata/web/check_results.py
index 6c8810f2b..4bb34a2a8 100644
--- a/src/allmydata/web/check_results.py
+++ b/src/allmydata/web/check_results.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/directory.py b/src/allmydata/web/directory.py
index 240fdd90c..4012f93fd 100644
--- a/src/allmydata/web/directory.py
+++ b/src/allmydata/web/directory.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/info.py b/src/allmydata/web/info.py
index 2d45f9994..ff126a2a1 100644
--- a/src/allmydata/web/info.py
+++ b/src/allmydata/web/info.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/logs.py b/src/allmydata/web/logs.py
index a79440eb9..7c4d285f5 100644
--- a/src/allmydata/web/logs.py
+++ b/src/allmydata/web/logs.py
@@ -1,12 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import (
-    print_function,
-    unicode_literals,
-    absolute_import,
-    division,
-)
 
 from autobahn.twisted.resource import WebSocketResource
 from autobahn.twisted.websocket import (
diff --git a/src/allmydata/web/operations.py b/src/allmydata/web/operations.py
index a564f8484..4319a4d9c 100644
--- a/src/allmydata/web/operations.py
+++ b/src/allmydata/web/operations.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/private.py b/src/allmydata/web/private.py
index 4f59be33a..55cace5a3 100644
--- a/src/allmydata/web/private.py
+++ b/src/allmydata/web/private.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/status.py b/src/allmydata/web/status.py
index 4a902a98b..96d68c87f 100644
--- a/src/allmydata/web/status.py
+++ b/src/allmydata/web/status.py
@@ -2,10 +2,6 @@
 Ported to Python 3.
 """
 
-from __future__ import division
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/storage.py b/src/allmydata/web/storage.py
index e568d5ed5..ebbef4fa3 100644
--- a/src/allmydata/web/storage.py
+++ b/src/allmydata/web/storage.py
@@ -1,10 +1,6 @@
 """
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/web/storage_plugins.py b/src/allmydata/web/storage_plugins.py
index 41bed9d81..9be4e84af 100644
--- a/src/allmydata/web/storage_plugins.py
+++ b/src/allmydata/web/storage_plugins.py
@@ -4,10 +4,6 @@ of all enabled storage client plugins.
 
 Ported to Python 3.
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from future.utils import PY2
 if PY2:
diff --git a/src/allmydata/windows/fixups.py b/src/allmydata/windows/fixups.py
index 53eb14d53..87e32a10f 100644
--- a/src/allmydata/windows/fixups.py
+++ b/src/allmydata/windows/fixups.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 from future.utils import PY3
 from past.builtins import unicode
diff --git a/ws_client.py b/ws_client.py
index 15d717d42..b444a878a 100644
--- a/ws_client.py
+++ b/ws_client.py
@@ -1,4 +1,3 @@
-from __future__ import print_function
 
 import sys
 import json