remove unused import
remove unused import

Change-Id: I82f45c1dca4b96c43387640803a006ac2ab61689

vivekdhayaal/keystone,ntt-sic/keystone,ilay09/keystone,mahak/keystone,citrix-openstack-build/keystone,jumpstarter-io/keystone,UTSA-ICS/keystone-kerberos,jumpstarter-io/keystone,townbull/keystone-dtrust,ilay09/keystone,derekchiang/keystone,roopali8/keystone,promptworks/keystone,jamielennox/keystone,rushiagr/keystone,dims/keystone,UTSA-ICS/keystone-kerberos,jonnary/keystone,cbrucks/Federated_Keystone,rickerc/keystone_audit,derekchiang/keystone,ajayaa/keystone,cloudbau/keystone,roopali8/keystone,citrix-openstack-build/keystone,blueboxgroup/keystone,ajayaa/keystone,townbull/keystone-dtrust,JioCloud/keystone,dstanek/keystone,nuxeh/keystone,ntt-sic/keystone,rodrigods/keystone,kwss/keystone,townbull/keystone-dtrust,mahak/keystone,reeshupatel/demo,openstack/keystone,blueboxgroup/keystone,kwss/keystone,dstanek/keystone,vivekdhayaal/keystone,ging/keystone,ntt-sic/keystone,takeshineshiro/keystone,cernops/keystone,openstack/keystone,kwss/keystone,cbrucks/Federated_Keystone,rodrigods/keystone,rickerc/keystone_audit,rushiagr/keystone,cernops/keystone,MaheshIBM/keystone,dsiddharth/access-keys,maestro-hybrid-cloud/keystone,dstanek/keystone,citrix-openstack-build/keystone,promptworks/keystone,openstack/keystone,cloudbau/keystone,klmitch/keystone,himanshu-setia/keystone,idjaw/keystone,mahak/keystone,rickerc/keystone_audit,ging/keystone,nuxeh/keystone,vivekdhayaal/keystone,rushiagr/keystone,promptworks/keystone,himanshu-setia/keystone,takeshineshiro/keystone,dsiddharth/access-keys,MaheshIBM/keystone,ilay09/keystone,klmitch/keystone,maestro-hybrid-cloud/keystone,idjaw/keystone,cloudbau/keystone,reeshupatel/demo,rajalokan/keystone,derekchiang/keystone,dsiddharth/access-keys,rajalokan/keystone,jamielennox/keystone,JioCloud/keystone,cbrucks/Federated_Keystone,dims/keystone,jumpstarter-io/keystone,reeshupatel/demo,nuxeh/keystone,rajalokan/keystone,jonnary/keystone