diff --git a/misc/python3/Makefile b/misc/python3/Makefile
deleted file mode 100644
index f0ef8b12a..000000000
--- a/misc/python3/Makefile
+++ /dev/null
@@ -1,53 +0,0 @@
-# Python 3 porting targets
-#
-# NOTE: this Makefile requires GNU make
-
-### Defensive settings for make:
-#     https://tech.davis-hansson.com/p/make/
-SHELL := bash
-.ONESHELL:
-.SHELLFLAGS := -xeu -o pipefail -c
-.SILENT:
-.DELETE_ON_ERROR:
-MAKEFLAGS += --warn-undefined-variables
-MAKEFLAGS += --no-builtin-rules
-
-
-# Top-level, phony targets
-
-.PHONY: default
-default:
-	@echo "no default target"
-
-.PHONY: test-py3-all-before
-## Log the output of running all tests under Python 3 before changes
-test-py3-all-before: ../../.tox/make-test-py3-all-old.log
-.PHONY: test-py3-all-diff
-## Compare the output of running all tests under Python 3 after changes
-test-py3-all-diff: ../../.tox/make-test-py3-all.diff
-
-
-# Real targets
-
-# Gauge the impact of changes on Python 3 compatibility
-# Compare the output from running all tests under Python 3 before and after changes.
-# Before changes:
-# `$ rm -f .tox/make-test-py3-all-*.log && make .tox/make-test-py3-all-old.log`
-# After changes:
-# `$ make .tox/make-test-py3-all.diff`
-$(foreach side,old new,../../.tox/make-test-py3-all-$(side).log):
-	cd "../../"
-	tox --develop --notest -e py36-coverage
-	(make VIRTUAL_ENV=./.tox/py36-coverage TEST_SUITE=allmydata \
-		test-venv-coverage || true) | \
-		sed -E 's/\([0-9]+\.[0-9]{3} secs\)/(#.### secs)/' | \
-		tee "./misc/python3/$(@)"
-../../.tox/make-test-py3-all.diff: ../../.tox/make-test-py3-all-new.log
-	(diff -u "$(<:%-new.log=%-old.log)" "$(<)" || true) | tee "$(@)"
-
-# Locate modules that are candidates for naively converting `unicode` -> `str`.
-# List all Python source files that reference `unicode` but don't reference `str`
-../../.tox/py3-unicode-no-str.ls:
-	cd "../../"
-	find src -type f -iname '*.py' -exec grep -l -E '\Wunicode\W' '{}' ';' | \
-		xargs grep -L '\Wstr\W' | xargs ls -ld | tee "./misc/python3/$(@)"