This reverts commit 3d2617983b.
The change was not quite right because the method six provides needs to
have `self` be passed in as well. See the docs here:
https://six.readthedocs.io/#unittest-assertions
Reverting for now and we can fix it in smaller chunks later.
CMS (Content Management System) ------------------------------- This directory contains code relating to the course management portal for edX, also known as Studio.