To delete a control you need to:

• Select it from the list and click on “Actions” at the top left of the screen.
• Choose the item "Delete"
• Select from the drop-down menu the control that must be assigned to any users enabled only for the control that is being deleted.
• Click on “Delete the control”.

Alternatively, it is possible to delete the control by clicking on the three dots on the right of the control and then on "Delete".