Remove some more library directives

pkg/analysis_server/test/src/watch_manager_test.dart

Index: pkg/analysis_server/test/src/watch_manager_test.dart
diff --git a/pkg/analysis_server/test/src/watch_manager_test.dart b/pkg/analysis_server/test/src/watch_manager_test.dart
index c3dc1459bbdbbb95953df5aca2c1c1a17a19df89..19b72c91f58c1c2fa519decf2e63f31d4636d6d6 100644
--- a/pkg/analysis_server/test/src/watch_manager_test.dart
+++ b/pkg/analysis_server/test/src/watch_manager_test.dart
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-library test.src.watch_manager_test;
-
 import 'dart:async';
 
 import 'package:analysis_server/src/watch_manager.dart';