Field isn't used in V8 anymore.

Change-Id: I564cfb30250e45cface0b6bdfd1390a458385bac
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2922243
Auto-Submit: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74821}