Delete roles 
Use this procedure to delete a custom role. You cannot delete built-in roles.
Steps
Select the Roles tab.
Select the Delete icon (
) at the end of the row for the role you want to delete.
In the Delete role window, select Delete.
Use this procedure to delete a custom role. You cannot delete built-in roles.
Select the Roles tab.
Select the Delete icon () at the end of the row for the role you want to delete.
In the Delete role window, select Delete.