Remove exceptions for missing CVO alert runbook URLs

The missing ClusterOperatorDown runbook URL was addressed in [1].
The missing ClusterVersionOperatorDown runbook URL was addressed in [2].

[1]: openshift/cluster-version-operator#1036
[2]: openshift/cluster-version-operator#1250

Author: DavidHurta

test/extended/prometheus/prometheus.go

@@ -194,11 +194,6 @@ var _ = g.Describe("[sig-instrumentation][Late] OpenShift alerting rules [apigro
 		// Issue: https://issues.redhat.com/browse/OCPBUGS-14057
 		"HAProxyDown",
 
-		// Repository: https://github.com/openshift/cluster-version-operator
-		// Issue: https://issues.redhat.com/browse/OCPBUGS-14246
-		"ClusterOperatorDown",
-		"ClusterVersionOperatorDown",
-
 		// Repository: https://github.com/openshift/managed-cluster-config
 		// Issue: https://issues.redhat.com/browse/OSD-21709
 		"AlertmanagerClusterCrashlooping",