Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/DOMImplementation.dartdoc

Index: lib/html/doc/interface/DOMImplementation.dartdoc
diff --git a/lib/html/doc/interface/DOMImplementation.dartdoc b/lib/html/doc/interface/DOMImplementation.dartdoc
deleted file mode 100644
index 39327a6a932b1703d2730be075e4faf9aa136ca1..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/DOMImplementation.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 DOMImplementation
-interface DOMImplementation {
-
-  /** @domName DOMImplementation.createCSSStyleSheet */
-  CSSStyleSheet createCSSStyleSheet(String title, String media);
-
-  /** @domName DOMImplementation.createDocument */
-  Document createDocument(String namespaceURI, String qualifiedName, DocumentType doctype);
-
-  /** @domName DOMImplementation.createDocumentType */
-  DocumentType createDocumentType(String qualifiedName, String publicId, String systemId);
-
-  /** @domName DOMImplementation.createHTMLDocument */
-  Document createHTMLDocument(String title);
-
-  /** @domName DOMImplementation.hasFeature */
-  bool hasFeature(String feature, String version);
-}