This is no longer needed by Chromium, after we land the GLES3
expectations patch.

BUG=angleproject:1071
BUG=510822

Change-Id: I63c2b020838aae8771314c959e9e7eb994bed93f
Reviewed-on: https://chromium-review.googlesource.com/287518Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>