Remove unused CONF import from placement/auth.py
Remove unused CONF import from placement/auth.py

Change-Id: Ib24536a6fbda0e641e5b9eef70be7f9b03ba31e4

rahulunair/nova,vmturbo/nova,Juniper/nova,gooddata/openstack-nova,vmturbo/nova,mahak/nova,mikalstill/nova,jianghuaw/nova,mahak/nova,mikalstill/nova,mikalstill/nova,gooddata/openstack-nova,phenoxim/nova,klmitch/nova,jianghuaw/nova,jianghuaw/nova,Juniper/nova,gooddata/openstack-nova,phenoxim/nova,vmturbo/nova,klmitch/nova,klmitch/nova,rahulunair/nova,gooddata/openstack-nova,Juniper/nova,openstack/nova,Juniper/nova,openstack/nova,rahulunair/nova,openstack/nova,mahak/nova,jianghuaw/nova,vmturbo/nova,klmitch/nova