These scripts are not used nor maintained anymore by V8.
We use https://chromium.googlesource.com/v8/node-ci/.

Node.js is now taking ownership of these scripts:
https://github.com/nodejs/node/pull/39222

Change-Id: I5600f3725d1ff9f78733952e5905faef0195a188
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3000966
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75596}