WooCommece - Exclude a category from shop page

functions.php

<?php
/**
 * This code should be added to functions.php of your theme
 **/
add_filter( 'parse_query', 'custom_parse_query' );

function custom_parse_query( $q ) {

	if ( !$q->is_post_type_archive() ) return;

	$q->set( 'tax_query', array(array(
		'taxonomy' => 'product_cat',
		'field' => 'slug',
		'terms' => array( 'tshirts' ),
		'operator' => 'NOT IN'
	)));

	remove_filter( 'parse_query', 'custom_parse_query' );

}
?>

could anyone pretty please see about getting this to work again, since last update this code no longer works. .i still see all categories on the home/shop page