code: func (s *schemaVersionSyncer) RemoveSelfVersionPath() error {
  	startTime := time.Now()
  	var err error
  	defer func() {
  		metrics.DeploySyncerHistogram.WithLabelValues(metrics.SyncerClear, metrics.RetLabel(err)).Observe(time.Since(startTime).Seconds())
  	}()
  
  	err = DeleteKeyFromEtcd(s.selfSchemaVerPath, s.etcdCli, keyOpDefaultRetryCnt, keyOpDefaultTimeout)
  	return errors.Trace(err)
  }
docs: // RemoveSelfVersionPath implements SchemaSyncer.RemoveSelfVersionPath interface.