Also remove ParameterMode since it is not needed.

Bug: v8:9708, v8:6949
Change-Id: If82cd5ffb89502e3feed7f5af613182df668080e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2370639Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69541}