These are unused Pmaddubsw, Pblendvb, Blendvps, Blendvpd.

Bug: v8:11879
Change-Id: Idff00ee031bc76698f2ddd92b6495450add0242d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3123636Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76546}