Cleanup: Remove unneeded forward declarations in chrome/browser/sync.

chrome/browser/sync/engine/resolve_conflicts_command.h

Index: chrome/browser/sync/engine/resolve_conflicts_command.h
===================================================================
--- chrome/browser/sync/engine/resolve_conflicts_command.h	(revision 110049)
+++ chrome/browser/sync/engine/resolve_conflicts_command.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -9,12 +9,6 @@
 #include "base/basictypes.h"
 #include "chrome/browser/sync/engine/model_changing_syncer_command.h"
 
-namespace syncable {
-class WriteTransaction;
-class MutableEntry;
-class Id;
-}
-
 namespace browser_sync {
 
 class ResolveConflictsCommand : public ModelChangingSyncerCommand {