This reverts commit 0258a061.

Reason for revert: breaks perfbots, e.g. https://luci-milo.appspot.com/buildbot/internal.client.v8/v8_arm64_perf/21485

Original change's description:
> [test] Add JSTest benchmark for object literal spread
> 
> Bug: v8:7611
> Change-Id: Ia5467fd4da3b385568bcc3f3fdc1a8c56bd6340e
> Reviewed-on: https://chromium-review.googlesource.com/987321
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52313}

TBR=gsathya@chromium.org,bmeurer@chromium.org

Change-Id: I4a0e8da965b784739f821ff2c3bba742e70a4b7f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7611
Reviewed-on: https://chromium-review.googlesource.com/992092Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52319}