48cd6edf98
With newer openstackdocstheme versions, many settings like html_last_updated_fmt and latex are setup correctly and don't need to setup in this repo anymore. We require a new enough version, so remove the obsolete settings. This repo now requires python 3, so remove python 2.7.x support. Update hacking to current version supporting python 3. Change-Id: I238eefeed275fe8115d0e253ca50d38086934b1e