Remove unused imports
Remove unused imports

Remove unused imports in doc/source/conf.py

Change-Id: Ia21f8952b36ae74b1c2d3bfd10c0a4a04a390faa
Closes-Bug: #1265266

rackerlabs/rackspace-python-neutronclient,eayunstack/python-neutronclient,johnpbatty/python-neutronclient,JioCloud/python-neutronclient,varunarya10/python-neutronclient,Juniper/python-neutronclient,noironetworks/python-neutronclient,mangelajo/python-neutronclient,yamahata/python-tackerclient,rackerlabs/rackspace-python-neutronclient,eayunstack/python-neutronclient,noironetworks/python-neutronclient,Stavitsky/python-neutronclient,sajuptpm/python-neutronclient-ipam,Stavitsky/python-neutronclient,NeCTAR-RC/python-neutronclient,JioCloud/python-neutronclient,cernops/python-neutronclient,huntxu/python-neutronclient,varunarya10/python-neutronclient,NeCTAR-RC/python-neutronclient,Juniper/python-neutronclient,cryptickp/python-neutronclient,mangelajo/python-neutronclient,venusource/python-neutronclient,cryptickp/python-neutronclient,openstack/python-neutronclient,roaet/python-neutronclient,johnpbatty/python-neutronclient,sajuptpm/python-neutronclient-ipam,yamahata/python-tackerclient,venusource/python-neutronclient,cernops/python-neutronclient,openstack/python-neutronclient,huntxu/python-neutronclient,roaet/python-neutronclient