Also remove useless docstrings where they were added to keep pylint quiet.
TNL-3179
Co-Authored-By: Jean-Michel Claus <jmc@edx.org> Co-Authored-By: Brian Talbot <btalbot@edx.org> Co-Authored-By: Tim Babych <tim@edx.org> Co-Authored-By: Oleg Marshev <oleg@edx.org> Co-Authored-By: Chris Rodriguez <crodriguez@edx.org>