Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/CSSMediaRule.dartdoc

Index: lib/html/doc/interface/CSSMediaRule.dartdoc
diff --git a/lib/html/doc/interface/CSSMediaRule.dartdoc b/lib/html/doc/interface/CSSMediaRule.dartdoc
deleted file mode 100644
index 666843c0e1f00d75aa2f13bef54bdf35f8ff5d0c..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/CSSMediaRule.dartdoc
+++ /dev/null
@@ -1,23 +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 CSSMediaRule
-interface CSSMediaRule extends CSSRule {
-
-  /** @domName CSSMediaRule.cssRules */
-  final CSSRuleList cssRules;
-
-  /** @domName CSSMediaRule.media */
-  final MediaList media;
-
-  /** @domName CSSMediaRule.deleteRule */
-  void deleteRule(int index);
-
-  /** @domName CSSMediaRule.insertRule */
-  int insertRule(String rule, int index);
-}