Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/MediaList.dartdoc

Index: lib/html/doc/interface/MediaList.dartdoc
diff --git a/lib/html/doc/interface/MediaList.dartdoc b/lib/html/doc/interface/MediaList.dartdoc
deleted file mode 100644
index 6a917b873be27fd3e81fa003c9adf8efc1d7c57e..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/MediaList.dartdoc
+++ /dev/null
@@ -1,26 +0,0 @@
-// 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 MediaList
-interface MediaList extends List<String> {
-
-  /** @domName MediaList.length */
-  final int length;
-
-  /** @domName MediaList.mediaText */
-  String mediaText;
-
-  /** @domName MediaList.appendMedium */
-  void appendMedium(String newMedium);
-
-  /** @domName MediaList.deleteMedium */
-  void deleteMedium(String oldMedium);
-
-  /** @domName MediaList.item */
-  String item(int index);
-}