Since the old pipeline has been removed
(https://chromium-review.googlesource.com/c/v8/v8/+/1903435), these
opcodes and methods are unused.

Bug: v8:7703
Change-Id: I626645a1405c79c6a202da6075fb64f0a2a41d25
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1921799
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65066}