This reverts commit b9821eff.

Reason for revert: Tests fail on gc-stress: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20gc%20stress/39147/overview

Original change's description:
> [stringrefs] Implement string.new_wtf16_array
>
> See https://github.com/WebAssembly/stringref/issues/1.
>
> Bug: v8:12868
> Change-Id: Iea3940c48d5f47609ff7d32e366d2f41d2161372
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3734808
> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
> Commit-Queue: Andy Wingo <wingo@igalia.com>
> Cr-Commit-Position: refs/heads/main@{#81448}

Bug: v8:12868
Change-Id: I7abf8817c51057d9b984175ce162364acbb41ac4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3735894
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81449}