Remove WooCommerce sorting options

functions.php

<?php

$studiowp_remove_orderby = array( 'rating', 'popularity', 'price', 'price-desc' );

add_action( 'init', 'studiowp_init_orderby' );
function studiowp_init_orderby() {
	global $studiowp_remove_orderby;
	if ( !is_admin() && isset( $_GET['orderby'] ) ) {
		if ( in_array( $_GET['orderby'], $studiowp_remove_orderby ) ) {
			wp_redirect( home_url() );
			exit;
		}
	}
}

add_filter( 'woocommerce_catalog_orderby', 'studiowp_woocommerce_catalog_orderby', 20 );
function studiowp_woocommerce_catalog_orderby( $orderby ) {
	global $studiowp_remove_orderby;
	foreach ( $studiowp_remove_orderby as $value ) {
		unset( $orderby[ $value ] );
	}
	return $orderby;
}