Remove more dead code

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 ca2777b4c75632678e1741192afa4e0aad1ab31e..ce5e85a3ace47c5d2cfcd7fe073b42528b247d6c 100644
--- a/pkg/analysis_server/test/channel/test_all.dart
+++ b/pkg/analysis_server/test/channel/test_all.dart
@@ -5,7 +5,6 @@
 import 'package:test/test.dart';
 
 import 'byte_stream_channel_test.dart' as byte_stream_channel_test;
-import 'web_socket_channel_test.dart' as web_socket_channel_test;
 
 /**
  * Utility for manually running all tests.
@@ -13,6 +12,5 @@ import 'web_socket_channel_test.dart' as web_socket_channel_test;
 main() {
   group('computer', () {
     byte_stream_channel_test.main();
-    web_socket_channel_test.main();
   });
 }