Remove unecessary sys.path add from docs/config.py
Remove unecessary sys.path add from docs/config.py

We explore, that sys.path magic in docs/conf.py is unecessary now. Also,
removing this strings provides compatibility with future Sphinx
releases.

Change-Id: I7028297f89b2ec0a1ab7007ad2594eec2c9000c0
closes-bug: #1285036

frossigneux/blazar,frossigneux/blazar,stackforge/blazar,stackforge/blazar,paramite/blazar,paramite/blazar,frossigneux/blazar,openstack/blazar,openstack/blazar,ChameleonCloud/blazar,ChameleonCloud/blazar