Teams can be deleted from rooms by first removing all the users from the team.
To delete a Team:
Go to the Teams Page on the left sidebar.
Expand the section of the Team you would like to delete, click on the corresponding actions menu beside each team member and then click on the Remove User button.
Confirm the removal of each member by clicking Remove User in the Remove User window.
Click the corresponding actions menu of the far right side.
Click Delete Team.
Confirm the deletion in the Delete Team window by clicking Delete Team.