This is to remove the workaround introduced by anglebug.com/2599 since
Nexus 5x devices aren't in the farm anymore and the tests pass on Pixel
devices.

Bug: angleproject:2599
Test: angle_deqp_gles2_tests
Test: angle_end2end_tests
Change-Id: I14f724494909486a2164ddd734a95b6980429f29
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1559202
Commit-Queue: Tim Van Patten <timvp@google.com>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>