Removing unused delegate assignment deletion code


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13637 e27351fd-9f3e-4f54-a53b-843176b1656c
Reducing agent idle timeout to 5 minutes


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@13638 e27351fd-9f3e-4f54-a53b-843176b1656c