With sphinx release of 5.0.0, they changed default for language variable
to 'en' from None. With that current None valuable is not valid and
should not be used.
With that we're also dropping setup.py as otherwise new setuptools
fails for docs job as well.
Change-Id: I264ec313bb9cdb1363339688cc63f080156c12cc
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
- Use newer openstackdocstheme and Sphinx versions,
enable build warnings and fix problems
- Cleanup */source/conf.py to remove now obsolete content.
- Remove install_command from tox.ini, the default is fine
- Remove usage of pip_install role, this is retired now
Change-Id: I64133e987965d02faa25102b98ad102ff9ef142b