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After experimenting with it, we've decided to not move forward. As the
implementation is causing some issues, it's best to just remove it.

Bug: 888783, 845187
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I4ef9622340266930737f9a2597c33375702f53b8
Reviewed-on: https://chromium-review.googlesource.com/c/1273069
Commit-Queue: Oskar Sundbom <ossu@chromium.org>
Reviewed-by: Henrik Andreasson <henrika@chromium.org>
Reviewed-by: Henrik Grunell <grunell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#598722}