Remove unnecessary check
Remove unnecessary check

We have done this in method validated(...) for all of the check
against request body.

Change-Id: I02361e279bb0229fd41e99a36198f2982b8635c2
Related-Bug: #1468597
mahak/keystone,cernops/keystone,klmitch/keystone,openstack/keystone,mahak/keystone,ilay09/keystone,idjaw/keystone,takeshineshiro/keystone,jamielennox/keystone,jamielennox/keystone,dims/keystone,dims/keystone,jonnary/keystone,roopali8/keystone,himanshu-setia/keystone,jonnary/keystone,rajalokan/keystone,maestro-hybrid-cloud/keystone,rajalokan/keystone,idjaw/keystone,cernops/keystone,mahak/keystone,himanshu-setia/keystone,ajayaa/keystone,ilay09/keystone,roopali8/keystone,openstack/keystone,ilay09/keystone,ajayaa/keystone,rajalokan/keystone,takeshineshiro/keystone,klmitch/keystone,openstack/keystone,maestro-hybrid-cloud/keystone