WooCommerce hide/exclude categories from category widget

functions.php

<?php

/* Exclude WC Product Categories */
function peltopiri_exclude_wc_widget_categories($cat_args) {
	$cat_args['exclude'] = array('16');
	return $cat_args;
}
add_filter('woocommerce_product_categories_widget_dropdown_args', 'peltopiri_exclude_wc_widget_categories');
add_filter('woocommerce_product_categories_widget_args', 'peltopiri_exclude_wc_widget_categories');