remove unused imports

src/allmydata/client.py

@@ -7,7 +7,6 @@ import os
 import stat
 import time
 import weakref
-import tempfile
 from typing import Optional, Iterable
 from base64 import urlsafe_b64encode
 from functools import partial

src/allmydata/test/web/test_webish.py

@@ -6,9 +6,6 @@ import tempfile
 from uuid import (
     uuid4,
 )
-from errno import (
-    EACCES,
-)
 from io import (
     BytesIO,
 )
@@ -30,9 +27,6 @@ from testtools.matchers import (
     HasLength,
 )
 
-from twisted.python.runtime import (
-    platform,
-)
 from twisted.python.filepath import (
     FilePath,
 )