Updated openstack/openstack
Project: openstack/heat  393760bdef73ed49b7c28b51e5984a4cbcbdce03
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Delete deprecated docs/ directory

I think we have deprecated this directory long enough.
We have proper getting started guides and api docs on openstack.org

Change-Id: Iaee690046866b98eea9a206dc6f2dca9b9af18b6