Cleaning up dart:html generation after interface/implementation merge. Removing most of the interfa…

sdk/lib/html/templates/html/interface/interface_MutationObserver.darttemplate

Index: sdk/lib/html/templates/html/interface/interface_MutationObserver.darttemplate
diff --git a/sdk/lib/html/templates/html/interface/interface_MutationObserver.darttemplate b/sdk/lib/html/templates/html/interface/interface_MutationObserver.darttemplate
deleted file mode 100644
index 328196dd04013623502c24528031a437327dad1d..0000000000000000000000000000000000000000
--- a/sdk/lib/html/templates/html/interface/interface_MutationObserver.darttemplate
+++ /dev/null
@@ -1,21 +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: Do not edit - generated code.
-
-part of html;
-
-$!COMMENT
-abstract class $ID$EXTENDS {
-$!MEMBERS
-  void observe(Node target,
-               {Map options,
-                bool childList,
-                bool attributes,
-                bool characterData,
-                bool subtree,
-                bool attributeOldValue,
-                bool characterDataOldValue,
-                List<String> attributeFilter});
-}