Pair Ops are for 31-bit support.
We had drop 31-bit support long time ago so don't need them anymore.

Change-Id: Iff1f8df19433fd1431316888d0c5276b9710b1fc
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2576003
Commit-Queue: Junliang Yan <junyan@redhat.com>
Reviewed-by: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/master@{#71625}