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.menu-icon-plugins,#wp-admin-bar-updates, a[href='update-core.php'],  #wp-version-message, .update-nag {
    display: none !important;
}

/* add css to wp-admin except admin with user id 1 */
add_action( 'admin_enqueue_scripts', function() {
    if(get_current_user_id() != 1  || isset($_REQUEST['test_admin_css'])) {
        wp_enqueue_style( 'NextBarberShop_admin_css', get_stylesheet_directory_uri() . '/admin-style.css', false, '1.0.0' );
    }
});