Also delete duplicated code

Bug: v8:6404
Change-Id: I7f24d99573a854254aa0fd332fe5c947f93e0552
Reviewed-on: https://chromium-review.googlesource.com/704223Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48347}