Remove unused function
Remove unused function

_assertNotifySeen was not being called.

Change-Id: I1f76aede7d1d3e6092c8e2bafa4af6c5eb5b74a3

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