Remove comment

Author: moomoohk

tox.ini

@@ -12,7 +12,6 @@ envlist = py36, pypy37, py38, py39, flake8
 [gh-actions]
 python =
     3.6: py36
-    # TODO(moomoohk): Get pypy to work properly. https://github.com/ymyzk/run-tox-gh-actions/issues/3
     pypy-3.7: pypy37
     3.8: py38
     3.9: py39, flake8