This reverts commit e839484e.

Reason for revert: https://ci.chromium.org/buildbot/client.v8/V8%20Linux64%20-%20debug/22300

Original change's description:
> [infra] Add gc_stats variant to Linux64 debug bot
> 
> No-try: true
> Bug: v8:7760
> Change-Id: I2a4e91b58de4387a4bfa5b79681db25880af8954
> Reviewed-on: https://chromium-review.googlesource.com/1068643
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53394}

TBR=machenbach@chromium.org,mlippautz@chromium.org

Change-Id: I7342341fb63742de4e51c0df65e8323f2a6dbd7a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7760
Reviewed-on: https://chromium-review.googlesource.com/1075927Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53395}