code: public static com.liferay.commerce.discount.model.CommerceDiscountRel deleteCommerceDiscountRel(
  		com.liferay.commerce.discount.model.CommerceDiscountRel commerceDiscountRel)
  		throws com.liferay.portal.kernel.exception.PortalException {
  		return getService().deleteCommerceDiscountRel(commerceDiscountRel);
  	}
docs: Deletes the commerce discount rel from the database. Also notifies the appropriate model listeners.
  
  @param commerceDiscountRel the commerce discount rel
  @return the commerce discount rel that was removed
  @throws PortalException