[Twisted-Python] Probot app to automatically delete merged branches

Hi, Do you see anything bad in enabling the delete-merged-branch app for twisted/twisted ? https://probot.github.io/apps/delete-merged-branch/ Right now Twisted has 1877 branches. My hope is that in this way we can keep the main repo clean and there will be less noise in autocompletion. Now, this will only handle future branches/merges ...but at least is a start. We can see later what to do with existing branches. Cheers -- Adi Roiban