The map is only used to check invariants.

Bug: v8:12054
Change-Id: I7d067cca801c9b6104efb22a26cf27f1f62920c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3268286Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77766}