Automate cleanup of temporary branches on personal that have been merged.
Automate cleanup of temporary branches on personal that have been merged.

This automates deletion of branches on personal that were created in the
process of automating submodule reference updates.

crowbar/crowbar,nkrinner/crowbar,crowbar/crowbar,mmnelemane/crowbar,toabctl/crowbar,MaximilianMeister/crowbar,tserong/crowbar,MaximilianMeister/crowbar,mmnelemane/crowbar,tserong/crowbar,dirkmueller/crowbar,SUSE-Cloud/crowbar,dirkmueller/crowbar,nkrinner/crowbar,aplanas/crowbar,SUSE-Cloud/crowbar,rhafer/crowbar,aspiers/crowbar,aplanas/crowbar,aspiers/crowbar,rsalevsky/crowbar,vwallfahrer/crowbar,rhafer/crowbar,vwallfahrer/crowbar,toabctl/crowbar,rhafer/crowbar,rsalevsky/crowbar