The counter is unused since https://crrev.com/c/2050398.

R=mlippautz@chromium.org

Bug: chromium:1275959
Change-Id: I0c1472e2d63451d3b7280f4ebec01314119584c0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3310926Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78248}