Code protection scopes now work with shared code, hence the TODO can be
removed.

R=jkummerow@chromium.org

Change-Id: I925732c653f652d4576f21e82c96c1477b11ec12
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2959612
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75129}