Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/WebKitNamedFlow.dartdoc

Index: lib/html/doc/interface/WebKitNamedFlow.dartdoc
diff --git a/lib/html/doc/interface/WebKitNamedFlow.dartdoc b/lib/html/doc/interface/WebKitNamedFlow.dartdoc
deleted file mode 100644
index 0df2b00be0c7375868adec557dbd179b8fedaa1b..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/WebKitNamedFlow.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 WebKitNamedFlow
-interface WebKitNamedFlow {
-
-  /** @domName WebKitNamedFlow.contentNodes */
-  final NodeList contentNodes;
-
-  /** @domName WebKitNamedFlow.name */
-  final String name;
-
-  /** @domName WebKitNamedFlow.overset */
-  final bool overset;
-
-  /** @domName WebKitNamedFlow.getRegionsByContentNode */
-  NodeList getRegionsByContentNode(Node contentNode);
-}