This reverts commit c45bc57d.

Reason for revert: Seen output once, that is enough.

Original change's description:
> [test] Temporary debug output for hanging tests
> 
> TBR=sigurds@chromium.org,sergiyb@chromium.org
> 
> Bug: v8:8292
> Change-Id: Ic03e2884ef645231807762f6b0210e69c5f9ac74
> Reviewed-on: https://chromium-review.googlesource.com/c/1282604
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56674}

TBR=machenbach@chromium.org,sigurds@chromium.org,sergiyb@chromium.org

Change-Id: Id5a2414682a9795998b86369368276e95c11394c
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8292
Reviewed-on: https://chromium-review.googlesource.com/c/1283112Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56683}