To archive a Team Site,...
1) go to www.teamsideline.com
2) click Team Site Sign in to sign in
3) under the "Teams" Tab click the team name you want to archive
4) click the "Edit Team" Tab.
5) click the checkbox called "Yes, archive this team"
6) click the Save button.
Result: Your Team will not display in your Current Teams list.
Note: Team Sites can not be deleted.