Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/MediaStream.dartdoc

-// Copyright (c) 2012, 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.
-
-// WARNING:
-//   This file contains documentation that is merged into the real source.
-//   Do not make code changes here.
-
-/// @domName MediaStream
-interface MediaStream extends EventTarget default _MediaStreamFactoryProvider {
-
-  MediaStream(MediaStreamTrackList audioTracks, MediaStreamTrackList videoTracks);
-
-  /**
-   * @domName EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent
-   */
-  MediaStreamEvents get on();
-
-  static final int ENDED = 2;
-
-  static final int LIVE = 1;
-
-  /** @domName MediaStream.audioTracks */
-  final MediaStreamTrackList audioTracks;
-
-  /** @domName MediaStream.label */
-  final String label;
-
-  /** @domName MediaStream.readyState */
-  final int readyState;
-
-  /** @domName MediaStream.videoTracks */
-  final MediaStreamTrackList videoTracks;
-
-  /** @domName MediaStream.addEventListener */
-  void $dom_addEventListener(String type, EventListener listener, [bool useCapture]);
-
-  /** @domName MediaStream.dispatchEvent */
-  bool $dom_dispatchEvent(Event event);
-
-  /** @domName MediaStream.removeEventListener */
-  void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]);
-}
-
-interface MediaStreamEvents extends Events {
-
-  EventListenerList get ended();
-}