d010814d3de25c20c5e2e9e13016d03a572f67cc

Make a few cleanups: - Remove obsolete sections from setup.cfg - Remove install_command from tox.ini, merge constraints into dependencies - Enable warnings for doc build, fix all warnings Change-Id: I3814f1a89882d0d86b621425dc9ff08f5c6b5d41
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