Remove unused imports
Remove unused imports

Change-Id: Ia2900e50263950ba40ba86e685640cacaa2137a7

openstack-dev/pbr,WiFast/pbr,redhat-openstack/pbr,klmitch/pbr,openstack-dev/pbr,emonty/oslo-packaging,openstack-dev/pbr,klmitch/pbr,emonty/oslo-packaging,citrix-openstack-build/pbr,redhat-openstack/pbr,varunarya10/pbr,varunarya10/pbr,JioCloud/pbr,citrix-openstack-build/pbr,citrix-openstack-build/pbr,JioCloud/pbr,WiFast/pbr