Cleanup groups.models.py.
Cleanup groups.models.py.

johngian/mozillians,mozilla/mozillians,ChristineLaMuse/mozillians,justinpotts/mozillians,chirilo/mozillians,hoosteeno/mozillians,fxa90id/mozillians,fxa90id/mozillians,chirilo/mozillians,chirilo/mozillians,akatsoulas/mozillians,ChristineLaMuse/mozillians,akarki15/mozillians,justinpotts/mozillians,safwanrahman/mozillians,mozilla/mozillians,akarki15/mozillians,anistark/mozillians,johngian/mozillians,justinpotts/mozillians,brian-yang/mozillians,fxa90id/mozillians,anistark/mozillians,johngian/mozillians,brian-yang/mozillians,safwanrahman/mozillians,hoosteeno/mozillians,hoosteeno/mozillians,akatsoulas/mozillians,safwanrahman/mozillians,fxa90id/mozillians,akarki15/mozillians,brian-yang/mozillians,akatsoulas/mozillians,chirilo/mozillians,justinpotts/mozillians,anistark/mozillians,hoosteeno/mozillians,akarki15/mozillians,safwanrahman/mozillians,anistark/mozillians,brian-yang/mozillians,akatsoulas/mozillians,ChristineLaMuse/mozillians,johngian/mozillians,mozilla/mozillians,mozilla/mozillians