Hide categories/taxonomies not associated with listings from showing in WP Job Manager Search and Filtering

functions.php

<?php
add_filter( 'search_and_filtering_get_taxonomy_data_options_args', 'smyles_sf_tax_hide_empty' );

function smyles_sf_tax_hide_empty( $args ){
	$args['hide_empty'] = true;
	return $args;
}