Removed unused abc meta class
Removed unused abc meta class

AlarmEvaluationService is not using abc.ABCMeta, so remove it.

Change-Id: I9df6ac9e5842d03191946f719549d554c51e6540

maestro-hybrid-cloud/ceilometer,pkilambi/ceilometer,froyobin/ceilometer,openstack/aodh,MisterPup/Ceilometer-Juno-Extension,openstack/aodh,m1093782566/openstack_org_ceilometer,isyippee/ceilometer,mathslinux/ceilometer,cernops/ceilometer,eayunstack/ceilometer,pkilambi/ceilometer,chungg/aodh,r-mibu/ceilometer,maestro-hybrid-cloud/ceilometer,pczerkas/aodh,eayunstack/ceilometer,luogangyi/Ceilometer-oVirt,pczerkas/aodh,sileht/aodh,redhat-openstack/ceilometer,openstack/ceilometer,froyobin/ceilometer,m1093782566/openstack_org_ceilometer,mathslinux/ceilometer,redhat-openstack/ceilometer,fabian4/ceilometer,isyippee/ceilometer,Juniper/ceilometer,ityaptin/ceilometer,fabian4/ceilometer,openstack/ceilometer,sileht/aodh,MisterPup/Ceilometer-Juno-Extension,chungg/aodh,cernops/ceilometer,Juniper/ceilometer,idegtiarov/ceilometer,luogangyi/Ceilometer-oVirt,ityaptin/ceilometer,r-mibu/ceilometer,idegtiarov/ceilometer