Drop incubating theme from docs
Drop incubating theme from docs

OpenStack has dropped the incubation notion, so labeling this as an
incubated project in the docs is confusing.

Change-Id: I9f9c70f9d6fd9156da66280183fa933f72b59d7a

sniperganso/python-manilaclient,sniperganso/python-manilaclient