Remove unused libraries.

lib/src/copy/web_socket.dart

Index: lib/src/copy/web_socket.dart
diff --git a/lib/src/copy/web_socket.dart b/lib/src/copy/web_socket.dart
deleted file mode 100644
index 53460baa3ea91b8e82a4ac140a992bf71ad825bf..0000000000000000000000000000000000000000
--- a/lib/src/copy/web_socket.dart
+++ /dev/null
@@ -1,40 +0,0 @@
-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// 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.
-
-// The following code is copied from sdk/lib/io/websocket.dart. The "dart:io"
-// implementation isn't used directly to support non-"dart:io" applications.
-//
-// Because it's copied directly, only modifications necessary to support the
-// desired public API and to remove "dart:io" dependencies have been made.
-//
-// This is up-to-date as of sdk revision
-// 86227840d75d974feb238f8b3c59c038b99c05cf.
-/**
- * Web socket status codes used when closing a web socket connection.
- */
-abstract class WebSocketStatus {
-  static const int NORMAL_CLOSURE = 1000;
-  static const int GOING_AWAY = 1001;
-  static const int PROTOCOL_ERROR = 1002;
-  static const int UNSUPPORTED_DATA = 1003;
-  static const int RESERVED_1004  = 1004;
-  static const int NO_STATUS_RECEIVED = 1005;
-  static const int ABNORMAL_CLOSURE = 1006;
-  static const int INVALID_FRAME_PAYLOAD_DATA = 1007;
-  static const int POLICY_VIOLATION = 1008;
-  static const int MESSAGE_TOO_BIG = 1009;
-  static const int MISSING_MANDATORY_EXTENSION = 1010;
-  static const int INTERNAL_SERVER_ERROR = 1011;
-  static const int RESERVED_1015 = 1015;
-}
-
-abstract class WebSocket {
-  /**
-   * Possible states of the connection.
-   */
-  static const int CONNECTING = 0;
-  static const int OPEN = 1;
-  static const int CLOSING = 2;
-  static const int CLOSED = 3;
-}