We don't typically remove teams that still has active members, which that one does. Once a team has been inactive for several months, it's automatically purged from the system. If it's a team you'd prefer to not have more involvement with, you are free to remove yourself as leader, of course (or I can do that for you, if you'd prefer). You can also choose to make the team private to prevent anyone else from joining. Let me know if you have any other questions!