Hide Admin Bar for All Users Except Administrator

//Hide admin bar for all users except administrator
add_action('after_setup_theme', 'remove_admin_bar');
function remove_admin_bar() {
$user = wp_get_current_user();
$allowed_roles = array('shop_manager', 'administrator');
	if(!is_admin()) {
        if( !array_intersect($allowed_roles, $user->roles ) ) { 
          show_admin_bar(false);
        }
    }
}