This repo is now testing only with Python 3, so let's make
a few cleanups:
- Remove python 2.7 stanza from setup.py
- Remove obsolete sections from setup.cfg
- Cleanup doc/source/conf.py to remove now obsolete content.
Change-Id: I1b8f09b5fce14b53d9538e32b7bd9e7c2615cf24
Marc Gariepy