Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/DOMTokenList.dartdoc

Index: lib/html/doc/interface/DOMTokenList.dartdoc
diff --git a/lib/html/doc/interface/DOMTokenList.dartdoc b/lib/html/doc/interface/DOMTokenList.dartdoc
deleted file mode 100644
index a4c2f1c5e85fffb4a887ea3dea44b4c9dc7738ed..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/DOMTokenList.dartdoc
+++ /dev/null
@@ -1,32 +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 DOMTokenList
-interface DOMTokenList {
-
-  /** @domName DOMTokenList.length */
-  final int length;
-
-  /** @domName DOMTokenList.add */
-  void add(String token);
-
-  /** @domName DOMTokenList.contains */
-  bool contains(String token);
-
-  /** @domName DOMTokenList.item */
-  String item(int index);
-
-  /** @domName DOMTokenList.remove */
-  void remove(String token);
-
-  /** @domName DOMTokenList.toString */
-  String toString();
-
-  /** @domName DOMTokenList.toggle */
-  bool toggle(String token);
-}