Remove some copy/pasted docstring in soc.views.models.comment module.
Remove some copy/pasted docstring in soc.views.models.comment module.

Patch by: Pawel Solyga
Reviewed by: to-be-reviewed

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging