This reverts commit 76f6c276.

Reason for revert: Mac64 ASAN is unhappy, please see https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Mac64%20ASAN%20-%20builder/194/overview

Original change's description:
> cppgc: Fix data race ObjectSizeTrait
>
> Fix benign race in
>   https://clusterfuzz.com/testcase-detail/5203237072076800
>
> Change-Id: I558b230e4905a48342d8e7cf70d39be5a1b7fdb8
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3306375
> Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
> Commit-Queue: Omer Katz <omerkatz@chromium.org>
> Auto-Submit: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Omer Katz <omerkatz@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#78121}

Change-Id: I96c40a1e3421f59cf97efd4a844a041280989171
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3306377
Auto-Submit: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78122}