Strict equality checking of ValueTypes only made sense before
reference types came along.

Change-Id: I632f541328cb27ae87a5e3daccd4ffb9cfc8a502
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928513
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74965}