WooCommerce - Restore admin category dropdown

<?php
// restore old dropdown category filter on admin products page
// snippet goes in functions.php for your child theme if you have one, or you can use the "My Custom Functions" plugin
add_action( 'restrict_manage_posts', 'wcacd_category_dropdown', 15 );
function wcacd_category_dropdown() {
  // show the old dropdown category filter from WC 3.1.2
  wc_product_dropdown_categories( array( 'option_select_text' => __( 'Filter by category', 'woocommerce' ) ) );
  // hide the WC 3.2+ ajax category filter
  print '<style>.post-type-product .tablenav div .select2 {display:none;}</style>';
}