This reverts commit aac491fc.

Reason for revert: This test is still failing on the Win7 NVIDIA bots:
https://ci.chromium.org/p/chromium/builders/ci/Win7%20FYI%20Release%20%28NVIDIA%29/6206
https://ci.chromium.org/p/chromium/builders/ci/Win7%20FYI%20x64%20Release%20%28NVIDIA%29/6261


Original change's description:
> Remove skipping of groupMemoryBarrierAndBarrierTest on NVIDIA
> 
> Remove skipping of groupMemoryBarrierAndBarrierTest on NVIDIA.
> 
> BUG=angleproject:2280
> 
> Change-Id: I9ea72939cd0f828295bb694c9d3515ef554c9a36
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1763948
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>

TBR=kkinnunen@nvidia.com,jmadill@chromium.org,svaisanen@nvidia.com

Change-Id: Ib7802e66b68419f7aa3dabf3a308811d36c52ff2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:2280
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1769076Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>