Revert "Attempt both GL and GLES for GPU unit tests"

This reverts commit 454818b80ae57edfa410f884de3ed31db1e7ea9c.

Reason for revert:  the GPU unit tests on Chromebook that this change enabled are not surprisingly broken.

Original change's description:
> Attempt both GL and GLES for GPU unit tests
> 
> The hardcoded logic was not all inclusive and caused Chromebooks to
> not run GPU unit tests.
> 
> Bug: skia:
> Change-Id: I7688adab314d12234ee03363609a1c4bf8f2edb5
> Reviewed-on: https://skia-review.googlesource.com/55561
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Chris Dalton <csmartdalton@google.com>

TBR=bsalomon@google.com,brianosman@google.com,csmartdalton@google.com

Change-Id: I48a6fdf0b21d3f3a795d9cf20564208f7c35ff5b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/55960
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed