[Sync] Clean up intra-sync DEPS significantly.

components/sync/engine_impl/commit_queue.h

Index: components/sync/engine_impl/commit_queue.h
diff --git a/components/sync/engine_impl/commit_queue.h b/components/sync/engine_impl/commit_queue.h
deleted file mode 100644
index cbe90eb7114603dd7822db293aa1fc6e14ffe241..0000000000000000000000000000000000000000
--- a/components/sync/engine_impl/commit_queue.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2014 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.
-
-#ifndef COMPONENTS_SYNC_ENGINE_IMPL_COMMIT_QUEUE_H_
-#define COMPONENTS_SYNC_ENGINE_IMPL_COMMIT_QUEUE_H_
-
-#include "components/sync/core/non_blocking_sync_common.h"
-
-namespace syncer_v2 {
-
-// Interface used by a synced data type to issue requests to the sync backend.
-class CommitQueue {
- public:
-  CommitQueue();
-  virtual ~CommitQueue();
-
-  // Entry point for the ModelTypeProcessor to send commit requests.
-  virtual void EnqueueForCommit(const CommitRequestDataList& list) = 0;
-};
-
-}  // namespace syncer_v2
-
-#endif  // COMPONENTS_SYNC_ENGINE_IMPL_COMMIT_QUEUE_H_