[infra] Remove job mistakenly made for nonexistent OS-12 Skolo Minis.

Back in 47045c9e0664ce8acf9ea5208d380e6f108fc239 I had meant to "Add a
Debug-All-NativeFonts CPU job for all OS versions on the new Mac Mini 7.1s."
Well, none of those is running 12.

Change-Id: I9dd13ce33c9a4004faf4da5f53d25c5ce5d8ec04
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/509718
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Erik Rose <erikrose@google.com>
2 files changed