Disable Schema plugin breadcrumbs https://schema.press/docs/breadcrumb-output/

schema-wp-breadcrumb-enable.php

<?php //* do not include php tag

/*
* A few ways to disable Schema plugin breadcrumbs json-ld output
*
* @since 1.6.9.5
*/

//------------------- (1)
//
// This will add a filter on `schema_wp_breadcrumb_enabled` that returns false 
add_filter( 'schema_wp_breadcrumb_enabled', '__return_false' ); 

//------------------- (2)
//
// This will add a filter on `schema_wp_breadcrumb_enabled` that returns false
// but allow you to something  in the function (see next function #3 for example)
add_filter( 'schema_wp_breadcrumb_enabled', 'schema_wp_breadcrumb_disable_238746' );
/*
* Disable breadcrumbs 
*
* @since 1.6.9.5
*/
function schema_wp_breadcrumb_disable_238746( $breadcrumb_enabled ){
	
	return false;
}

//------------------- (3)
//
// This will add a filter on `schema_wp_breadcrumb_enabled` that returns false, 
// This example will disable breadcrumbs on WooCommerce
add_filter( 'schema_wp_breadcrumb_enabled', 'schema_wp_breadcrumb_woo_product_disable' );
/*
* Disable breadcrumbs on WooCommerce 
*
* @since 1.6.9.5
*/
function schema_wp_breadcrumb_woo_product_disable( $breadcrumb_enabled ){
	
	if ( class_exists( 'woocommerce' ) ) { 
		if ( is_woocommerce() ) return false;
	}
}