LAST_FUNCTION_TYPE, FIRST_FUNCTION_TYPE are no longer necessary.

TBR: tebbi@chromium.org
Bug: v8:11256
Change-Id: I37b1396eca8f89a287e04f2ef6b642dad248ae67
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2599745
Commit-Queue: Sathya Gunasekaran  <gsathya@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71852}