Remove 'setup.py saveopts' step from tox.ini

Should be no longer necessary now that `setup.cfg` is gone.

Author: abravalheri

tox.ini

@@ -101,8 +101,6 @@ 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