Remove ignore portion of tox.ini
Remove ignore portion of tox.ini

In the latest hacking update a few rules were dropped, and we no
longer have to ignore these rules in our tox.ini.

Change-Id: Id38a1497019c7fe2d4ad8567f1c0c8d229951751

redhat-openstack/python-openstackclient,openstack/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient,BjoernT/python-openstackclient,dtroyer/python-openstackclient,openstack/python-openstackclient,BjoernT/python-openstackclient