Decommission chromium.angle Mac builders duplicated in standalone

Bug: 1246552
Change-Id: Ie154f26caef0b280b354bb7a5c5bca1f94477a69
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3141539


Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#918341}