.. which applied to the AssemblePopArgumentsAdaptorFrame
function that no longer exists.

Drive-by: Remove unused functions in mips, mips64.

Bug: v8:11306
Change-Id: Ia47c4287a452afe0aea2be0902cb3adce15f02bf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2649029Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Auto-Submit: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72313}