lib/config: Decouple VerifyConfiguration from Committer (#7939)

... and remove 8/10 implementations, which were no-ops. This saves code
and time copying configurations.

lib/ur/failurereporting.go

@@ -188,10 +188,6 @@ func (h *failureHandler) addReport(data FailureData, evTime time.Time) {
 	}
 }
 
-func (h *failureHandler) VerifyConfiguration(_, _ config.Configuration) error {
-	return nil
-}
-
 func (h *failureHandler) CommitConfiguration(from, to config.Configuration) bool {
 	if from.Options.CREnabled != to.Options.CREnabled || from.Options.CRURL != to.Options.CRURL {
 		h.optsChan <- to.Options

lib/ur/usage_report.go

@@ -390,10 +390,6 @@ func (s *Service) Serve(ctx context.Context) error {
 	}
 }
 
-func (s *Service) VerifyConfiguration(from, to config.Configuration) error {
-	return nil
-}
-
 func (s *Service) CommitConfiguration(from, to config.Configuration) bool {
 	if from.Options.URAccepted != to.Options.URAccepted || from.Options.URUniqueID != to.Options.URUniqueID || from.Options.URURL != to.Options.URURL {
 		select {