Remove CQ for unsupported branch refs/heads/chrome/m147

Change-Id: I721b41cbe209a09048a49076271fc43502595128
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1282198
Bot-Commit: chrome-branch-day <chrome-branch-day@chops-service-accounts.iam.gserviceaccount.com>
1 file changed