protected function removeListItems( $productId )
	{
		$manager = \Aimeos\MShop::create( $this->getContext(), 'product/lists' );

		$search = $manager->createSearch();
		$expr = array(
			$search->compare( '==', 'product.lists.parentid', $productId ),
			$search->compare( '==', 'product.lists.domain', 'product' ),
			$search->compare( '==', 'product.lists.type', 'bought-together' ),
		);
		$search->setConditions( $search->combine( '&&', $expr ) );

		$listItems = $manager->searchItems( $search );

		$manager->deleteItems( array_keys( $listItems ) );
	}