Unable to Dequeue Script and StyleSheet

Trying to dequeue the stylesheet and js on the frontend:

add_action('wp_print_scripts', 'se_deregister_stylesheets_scripts', 999 );
function se_deregister_stylesheets_scripts() {
    if( is_admin() ){
        // Do Nothing
    }else{
        wp_deregister_style('wp-gallery-metabox');
        wp_deregister_script('wp-gallery-metabox');
    }
}