In a previous CL the logic for generating the description for Trusted Types was added to Blink. Therefore, the corresponding logic remaining in V8 can be deleted safely.

Previous CL: https://chromium-review.googlesource.com/c/v8/v8/+/2502342

Bug: chromium:1048143
Change-Id: I1693fa1d213066cbc1fe822f890d2d7aaf7ce0f6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2502869Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Alfonso Castaño <alcastano@google.com>
Cr-Commit-Position: refs/heads/master@{#71173}