Remove unused variable
Remove unused variable

o keystone/common/wsgi.py:_RE_PASS
  = re.compile(r'([\'"].*?password[\'"]\s*:\s*u?[\'"]).*?([\'"])',

  This variable was removed in the following commit.

    commit d910f1ff593dbd66f5643901142f390d0de73bdc
    Author: Brant Knudson <bknudson@us.ibm.com>
    Date:   Mon Dec 16 19:49:52 2013 -0600

        Switch to oslo-incubator mask_password

Change-Id: I6236bdb34cfcddcb338bb066450f4e89c5447e24

MaheshIBM/keystone,openstack/keystone,jamielennox/keystone,vivekdhayaal/keystone,takeshineshiro/keystone,roopali8/keystone,mahak/keystone,dims/keystone,nuxeh/keystone,roopali8/keystone,jumpstarter-io/keystone,jumpstarter-io/keystone,promptworks/keystone,reeshupatel/demo,UTSA-ICS/keystone-kerberos,jonnary/keystone,reeshupatel/demo,rajalokan/keystone,ajayaa/keystone,idjaw/keystone,reeshupatel/demo,ging/keystone,idjaw/keystone,dstanek/keystone,rodrigods/keystone,rodrigods/keystone,vivekdhayaal/keystone,blueboxgroup/keystone,nuxeh/keystone,JioCloud/keystone,jonnary/keystone,ilay09/keystone,jamielennox/keystone,cernops/keystone,dims/keystone,dstanek/keystone,himanshu-setia/keystone,promptworks/keystone,rajalokan/keystone,openstack/keystone,rushiagr/keystone,maestro-hybrid-cloud/keystone,klmitch/keystone,rajalokan/keystone,MaheshIBM/keystone,JioCloud/keystone,himanshu-setia/keystone,nuxeh/keystone,dstanek/keystone,ajayaa/keystone,cernops/keystone,klmitch/keystone,rushiagr/keystone,mahak/keystone,vivekdhayaal/keystone,maestro-hybrid-cloud/keystone,mahak/keystone,rushiagr/keystone,jumpstarter-io/keystone,UTSA-ICS/keystone-kerberos,ging/keystone,promptworks/keystone,ilay09/keystone,openstack/keystone,takeshineshiro/keystone,blueboxgroup/keystone,ilay09/keystone