WooCommerce 3.3 Hide uncategorized category from shop

woocommerce-3.3-hide-uncetagorized-category.php

<?php
add_filter( 'woocommerce_product_subcategories_args', 'remove_uncategorized_category' );
/**
 * Remove uncategorized category from shop page.
 *
 * @param array $args Current arguments.
 * @return array
 **/
function remove_uncategorized_category( $args ) {
  $uncategorized = get_option( 'default_product_cat' );
  $args['exclude'] = $uncategorized;
  return $args;
}

Thanks, this worked perfectly.
Small note, the <?php at the top is not needed on the functions page.
Thanks Kloon for this great code!

Sorry, where do I put this code ? Thanks !

None of the suggestions here worked for me but this did.

This snippet didnt work, and neither did the one JayHoltslander suggested.

Doesn't work - does nothing.