Revert "[magma] Disable EXT_calibrated_timestamps temporarily on Linux"

This reverts commit 085e8070fc11679f1620f690083f4be4280f6eed.

Reason for revert: Made zink regress from OpenGL 4.6 to 3.2.

Original change's description:
> [magma] Disable EXT_calibrated_timestamps temporarily on Linux
>
> Bug:87391
>
> Change-Id: I657e64521cca06a4b3a4167f778834c967b02fca
> Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/638105
> Reviewed-by: David Reveman <reveman@google.com>

Bug: 87391
Change-Id: Ia3b70cbd0ba9965012acd40cda6d2c5c9007088e
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/639602
Reviewed-by: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Reviewed-by: Craig Stout <cstout@google.com>
1 file changed