Remove unused code and templates.

lib/dom/templates/dom/native/factoryprovider.darttemplate

Index: lib/dom/templates/dom/native/factoryprovider.darttemplate
diff --git a/lib/dom/templates/dom/native/factoryprovider.darttemplate b/lib/dom/templates/dom/native/factoryprovider.darttemplate
deleted file mode 100644
index 33e01ca16756977e846a7528fd4d64c52436c2c6..0000000000000000000000000000000000000000
--- a/lib/dom/templates/dom/native/factoryprovider.darttemplate
+++ /dev/null
@@ -1,8 +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.
-
-class $FACTORY_PROVIDER {
-  factory $CONSTRUCTOR($PARAMETERS) =>
-      $IMPL_CLASS.$IMPL_FUNCTION($ARGUMENTS);
-}