Branches are removed immediately when days-before-branch-delete === 0

[slawekGoszcz]

I think plugins should remove branches instantly when daysBeforeBranchDelete == 0. Now second iteration is required.

[CodySchneider]

Agree that this would be helpful. I just ran into this on my first pass through our repo. We had some branches that were 5 years old and I just wanted to kill anything over a year immediately without review process.

[fpicalausa]

Initially, I intentionally skipped this behavior to avoid unintentionally pruning a whole lot of things at once. In retrospect, it does make sense though. Thanks for the contribution.