Revert "Clearing up invalid entries when SyncStorageEngine starts" am: 4a9d358448 am: 0597a93629  -s ours am: d2455f8fa2 am: 2d194e5958 am: 57bbf9bb9c am: cf16ef09da am: f0d00e51ba am: 4e61bdb7d3 am: d1e7db9f4a am: 9ecbe6f6e7
am: a9e9e83964

Change-Id: I97ab1af2f24b3773cb879f13d00fb1df0177f3fc