The NowIs operator doesn't exist anymore.

R=mslekova@chromium.org

Change-Id: Id081c7e0cf5b122a77598fc0b886a2d1c09c881f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3172767Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76968}