public function delete_order_item( $item_id ) {
		// Load the order ID before the deletion, since after, it won't exist in the database.
		$order_id = $this->get_order_id_by_order_item_id( $item_id );

		global $wpdb;
		$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}woocommerce_order_items WHERE order_item_id = %d", $item_id ) );
		$wpdb->query( $wpdb->prepare( "DELETE FROM {$wpdb->prefix}woocommerce_order_itemmeta WHERE order_item_id = %d", $item_id ) );

		$this->clear_caches( $item_id, $order_id );
	}