We don't use it anywhere anymore.

BUG=

Change-Id: I9acd9c427c6af7422bbdf58088b61ceafd1ee655
Reviewed-on: https://chromium-review.googlesource.com/462968Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44265}