1. Sync sphinx dependency with global requirements. It caps python 2 since sphinx 2.0 no longer supports Python 2.7. 2. Update some URLs to latest 3. Remove unncessary "==" Change-Id: I48206450371b557f51b0842976d48c9042173df2
Removed babel related things - we're not expecting to have translations. Change-Id: I510195c6c83c99d78c90571ff0fdea8219833d95