Remove explicit interface versions of dartdoc files.

lib/html/doc/interface/TableSectionElement.dartdoc

Index: lib/html/doc/interface/TableSectionElement.dartdoc
diff --git a/lib/html/doc/interface/TableSectionElement.dartdoc b/lib/html/doc/interface/TableSectionElement.dartdoc
deleted file mode 100644
index 014ba960d0eb1e1fb5d116a3e19032fce35ee91e..0000000000000000000000000000000000000000
--- a/lib/html/doc/interface/TableSectionElement.dartdoc
+++ /dev/null
@@ -1,32 +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 HTMLTableSectionElement
-interface TableSectionElement extends Element {
-
-  /** @domName HTMLTableSectionElement.align */
-  String align;
-
-  /** @domName HTMLTableSectionElement.ch */
-  String ch;
-
-  /** @domName HTMLTableSectionElement.chOff */
-  String chOff;
-
-  /** @domName HTMLTableSectionElement.rows */
-  final HTMLCollection rows;
-
-  /** @domName HTMLTableSectionElement.vAlign */
-  String vAlign;
-
-  /** @domName HTMLTableSectionElement.deleteRow */
-  void deleteRow(int index);
-
-  /** @domName HTMLTableSectionElement.insertRow */
-  Element insertRow(int index);
-}