Snippet to remove WooCommerce catalogue sorting option

remove-sorting-option.php

<?php

// orderby values are date, menu_order, popularity, rating, date, price, price-desc

add_filter( 'woocommerce_catalog_orderby', 'custom_woocommerce_catalog_orderby', 20 );
function custom_woocommerce_catalog_orderby( $orderby ) {
	unset($orderby["price"]); // Remove price option
	return $orderby;   
}

?>