Remove Uncategorized from widget

function remove_uncategorized_category( $terms, $taxonomy, $query_vars, $term_query ) {
	if ( is_admin() )
		return $terms;	if ( $taxonomy[0] == 'product_cat' ) {
		foreach ( $terms as $k => $term ) {
			if ( $term->term_id == get_option( 'default_product_cat' ) ) {
				unset( $terms[$k] );
			}
		}
	}	return $terms;
}
add_filter( 'get_terms', 'remove_uncategorized_category', 10, 4 );