Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/EmbedElement.dartdoc

Index: lib/html/doc/interface/EmbedElement.dartdoc
diff --git a/lib/html/doc/interface/EmbedElement.dartdoc b/lib/html/doc/interface/EmbedElement.dartdoc
deleted file mode 100644
index a190f336f80c27f1cf6aa2411bb094f4497b9092..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/EmbedElement.dartdoc
+++ /dev/null
@@ -1,31 +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 HTMLEmbedElement
-interface EmbedElement extends Element default _Elements {
-
-  EmbedElement();
-
-  /** @domName HTMLEmbedElement.align */
-  String align;
-
-  /** @domName HTMLEmbedElement.height */
-  String height;
-
-  /** @domName HTMLEmbedElement.name */
-  String name;
-
-  /** @domName HTMLEmbedElement.src */
-  String src;
-
-  /** @domName HTMLEmbedElement.type */
-  String type;
-
-  /** @domName HTMLEmbedElement.width */
-  String width;
-}