Removing code left over by
https://chromium-review.googlesource.com/c/v8/v8/+/3124806 .

Bug: v8:7790
Change-Id: Id198df521ff58fe4f476f6f6a1fc624cb297be4a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3147591Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76764}