It's no longer needed.

Bug: chromium:947060
Change-Id: I873f17a4876b9d0fac313740853054b6867afeb9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1610077Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>