We won't remove the jump table for performance reasons. That would
complicate a lot of code and remove options for tiering and code
aging.
Thus remove the TODO.

R=titzer@chromium.org

No-Try: true
Change-Id: Ifbbfdeeeb17078feaea4f358169bc5943ba09ddb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1593089Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61160}