It is only used during initialization.

Bug: v8:7790
Change-Id: I2105ad01413e3b398b3252d14e83c930c0dd3e74
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2536637Reviewed-by: Santiago Aboy Solanes <solanes@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71186}