If your season has completed or you no longer want to view a team
From the App:
From the app, open the drop-down menu to view teams (top left corner)
At the bottom of the list, click 'Manage Teams'
Toggle off the team you want to 'turn off' and press save.
From the Web:
Go to the Dashboard
Click the Add/Join button beside the Team Dropdown in the upper left then 'Manage Teams'
Click the Hide link for the team you no longer want to see
This will remove the team from your teams list.