Remove some more library directives

pkg/analysis_server/test/channel/test_all.dart

Index: pkg/analysis_server/test/channel/test_all.dart
diff --git a/pkg/analysis_server/test/channel/test_all.dart b/pkg/analysis_server/test/channel/test_all.dart
index 2e1538d6fab840306a96d603f9ca97f68c780edc..ca2777b4c75632678e1741192afa4e0aad1ab31e 100644
--- a/pkg/analysis_server/test/channel/test_all.dart
+++ b/pkg/analysis_server/test/channel/test_all.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.channel.all;
-
 import 'package:test/test.dart';
 
 import 'byte_stream_channel_test.dart' as byte_stream_channel_test;