update.php clears caches twice

There was a bad rebase on I96b4cfd4c02e9cbf46cc6a0499b87fb3b89020a0,
because it partically reverts Ice42a31dee1e6b41da4aa0a47e8786579382aff1

Bug: 44690
Change-Id: Iff2c8d3cb1a10da7cd0ab18ee189454761d7db6f