The TODOs are wrong for now since even without full codegen, it's still
possible for it to be compiled, so this just removes them

Bug: v8:8562
Change-Id: Ia9f2539e22364b31c0b45b0408dfe434f212c72a
Reviewed-on: https://chromium-review.googlesource.com/c/1384311Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58367}