Revert "Clearing up invalid entries when SyncStorageEngine starts" am: 4a9d358448 am: 0597a93629  -s ours am: d2455f8fa2 am: 2d194e5958 am: 57bbf9bb9c
am: cf16ef09da

Change-Id: I82ed951a2f528dab65b95332db48a865b3fe9296