v3rpc: Tiny clean up

unreachable code

etcdserver/api/v3rpc/watch.go

@@ -79,7 +79,6 @@ func sendLoop(stream pb.Watch_WatchServer, watcher storage.Watcher, closec chan
 				}
 				storage.ReportEventReceived()
 			}
-			return
 		}
 	}
 }