Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/MediaError.dartdoc

Index: lib/html/doc/interface/MediaError.dartdoc
diff --git a/lib/html/doc/interface/MediaError.dartdoc b/lib/html/doc/interface/MediaError.dartdoc
deleted file mode 100644
index 3593fb2707a5e849a390e7c2435ac7cc944137e4..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/MediaError.dartdoc
+++ /dev/null
@@ -1,24 +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 MediaError
-interface MediaError {
-
-  static final int MEDIA_ERR_ABORTED = 1;
-
-  static final int MEDIA_ERR_DECODE = 3;
-
-  static final int MEDIA_ERR_ENCRYPTED = 5;
-
-  static final int MEDIA_ERR_NETWORK = 2;
-
-  static final int MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
-
-  /** @domName MediaError.code */
-  final int code;
-}