Instructions
Click Gateways in the navigation menu. There you will find an overview of all your active gateways.
Click on the gateway you wish to unregister.
In the edit screen, click on Options.
Then click Unregister Gateway.
You will be asked to confirm the deregistration. Click Unregister to confirm, or on Cancel to abort.
You will then receive a notification that the deregistration has been completed.