Remove invocation of bootstrap script in release process.

Author: jaraco

tox.ini

@@ -66,7 +66,6 @@ passenv =
 setenv =
 	TWINE_USERNAME = {env:TWINE_USERNAME:__token__}
 commands =
-	python -m bootstrap
 	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