w3bdesign / algolia-woo-indexer

uninstall.php

<?php
/**
 * Delete the saved options freom the database when we uninstall the plugin
 * We do not do it when we deactivate the plugin, in case we want to maintain the data
 *
 * @package         algolia-woo-indexer
 */

/*
*  If uninstall was not called from WordPress, then exit
*/
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

define( 'ALGOWOO_DB_OPTION', '_algolia_woo_indexer' );

delete_option( ALGOWOO_DB_OPTION . '_application_id' );

The function delete_option was not found. Maybe you did not declare it correctly or list all dependencies?

delete_option( ALGOWOO_DB_OPTION . '_admin_api_key' );
delete_option( ALGOWOO_DB_OPTION . '_index_name' );
delete_option( ALGOWOO_DB_OPTION . '_index_in_stock' );
delete_option( ALGOWOO_DB_OPTION . '_automatically_send_new_products' );