Remove post-release tags on setuptools' own build.

Ref #4530

Author: jaraco

setup.cfg

@@ -103,8 +103,6 @@ setenv =
 	TWINE_USERNAME = {env:TWINE_USERNAME:__token__}
 commands =
 	python -c "import shutil; shutil.rmtree('dist', ignore_errors=True)"
-	# unset tag_build and tag_date pypa/setuptools#2500
-	python setup.py egg_info -Db "" saveopts
 	python -m build
 	python -m twine upload dist/*
 	python -m jaraco.develop.create-github-release