Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/SVGLengthList.dartdoc

Index: lib/html/doc/interface/SVGLengthList.dartdoc
diff --git a/lib/html/doc/interface/SVGLengthList.dartdoc b/lib/html/doc/interface/SVGLengthList.dartdoc
deleted file mode 100644
index 6c2fd595bbcbcecff187e517d3cba487a2125ae2..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/SVGLengthList.dartdoc
+++ /dev/null
@@ -1,35 +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 SVGLengthList
-interface SVGLengthList {
-
-  /** @domName SVGLengthList.numberOfItems */
-  final int numberOfItems;
-
-  /** @domName SVGLengthList.appendItem */
-  SVGLength appendItem(SVGLength item);
-
-  /** @domName SVGLengthList.clear */
-  void clear();
-
-  /** @domName SVGLengthList.getItem */
-  SVGLength getItem(int index);
-
-  /** @domName SVGLengthList.initialize */
-  SVGLength initialize(SVGLength item);
-
-  /** @domName SVGLengthList.insertItemBefore */
-  SVGLength insertItemBefore(SVGLength item, int index);
-
-  /** @domName SVGLengthList.removeItem */
-  SVGLength removeItem(int index);
-
-  /** @domName SVGLengthList.replaceItem */
-  SVGLength replaceItem(SVGLength item, int index);
-}