This reverts commit 21add124.

Reason for revert: Fails on Windows 7 x64 Chromium config.
https://ci.chromium.org/p/chromium/builders/ci/Win%207%20Tests%20x64%20%281%29/73194

Original change's description:
> Re-enable crash testing in angle_unittests.
>
> This is an experimental test to see if this works now.
> Disabled on Win/ASAN because of conflicts with the
> crash callback.
>
> Bug: angleproject:5239
> Change-Id: I280b18ab8846de79b561f26716df9ba374cfd9a5
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2496040
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Commit-Queue: Jamie Madill <jmadill@chromium.org>

TBR=ynovikov@chromium.org,jmadill@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: angleproject:5239
Change-Id: I83c150c2c2090b7d1aeb78e53e96115a167a7491
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2505479
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>