Deleting branch in Git triggers deployment

[callumbwhyte]

Issue description

I accidentally pushed a branch from my local to Git that should not have been pushed... No stress, just delete the branch...

When pushing any new branch, not just master, a new build + deploy is triggered in Umbraco Cloud.

The same happens when deleting any branch from the remote – a build and deploy is triggered.

This feels a bit wasteful and unnecessary! Also potentially dangerous, I'm not clear exactly what is being deployed and to where in this case...