Yes, you can delete an active promo code which is not used by anyone(registrant).
Step 1: Click on Delete icon of the Promo Code.
Step 2: Promo Code delete Confirmation alert will be displayed.
” Are you sure, Do you want to Delete Promo Code ?”
Click on ‘Yes’ to delete promo Code.
Click on ‘No‘ to exit alert without deleting promo code.