This reverts commit de5f8614.

Reason for revert: TSAN https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20TSAN/b8851216731882090320/overview

Original change's description:
> [atomics] Fix critical section for Atomics.waitAsync
>
> Loading the value at the index for the futex wait should be protected by
> the waiterlist mutex for both sync and async waits.
>
> Bug: chromium:1194026
> Change-Id: Ie9896cab6828763ebb963f5ad96f264d57c9377f
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2796159
> Commit-Queue: Shu-yu Guo <syg@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#73753}

Bug: chromium:1194026
Change-Id: I63d5e224f11a35fd9c36d62d08ce642d3e6f64bf
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2797550
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#73755}