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