Clean up targets properly on bucket deletion (#12565)

cmd/peer-rest-server.go

@@ -521,6 +521,7 @@ func (s *peerRESTServer) DeleteBucketMetadataHandler(w http.ResponseWriter, r *h
 
 	globalReplicationStats.Delete(bucketName)
 	globalBucketMetadataSys.Remove(bucketName)
+	globalBucketTargetSys.Delete(bucketName)
 	if localMetacacheMgr != nil {
 		localMetacacheMgr.deleteBucketCache(bucketName)
 	}