code: @Indexable(type = IndexableType.DELETE)
  	@Override
  	public CommerceDiscountRel deleteCommerceDiscountRel(
  		long commerceDiscountRelId) throws PortalException {
  		return commerceDiscountRelPersistence.remove(commerceDiscountRelId);
  	}
docs: Deletes the commerce discount rel with the primary key from the database. Also notifies the appropriate model listeners.
  
  @param commerceDiscountRelId the primary key of the commerce discount rel
  @return the commerce discount rel that was removed
  @throws PortalException if a commerce discount rel with the primary key could not be found