Deletes a loyalty coupon.
The deletion of a loyalty coupon does not impact the functionality of the corresponding coupon itself.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the loyalty coupon to delete.
Revision number, which increments by 1 each time the loyalty coupon is updated.
To prevent conflicting changes, the current revision must be passed when updating the loyalty coupon.