To delete a Team, you'll need to either delete or move it's Projects into another Team (even if the Projects have been archived, they can't remain in the Team you wish to delete). Here's more information about how to archive and delete Projects.
Once all the Projects in the Team have been deleted or moved, you can delete the Team in Settings > Workspace Features > Teams. To do that:
- In the Teams Settings menu, Click Edit Team/Projects for the Team you need to delete, and click the drop down menu for any Projects not yet moved out of the Team; move them to another Team.
- Once all Projects have been moved, click on the trash can icon next to the Update Team button.
- You'll be asked to confirm that you want to delete the Team; if so, click OK.
You'll see a pop-up confirming that the Team has been deleted, and it will disappear from the Teams list.