Delete Button
Sometimes you may need to remove a device from an existing map. The "Delete"
button serves this purpose. First, select the Device Tab for the controller
you want to remove from the map so the controller is the one showing in the
Selection Pane (left-hand window). Once the controller has been selected,
click the Delete button. It looks like this:

The tab (and its associated device) will disappear from the map. This doesn't change
any device assignments for any other controllers that may be present in
the map so some things may need to be reassigned as a result of the removal.