hide desktop header midbar

add_action(
    'customize_controls_enqueue_scripts',
    function () {
        $custom_css = '
        .header-builder-desktop .header-builder-wrapper .header-builder-mid {
            display : none ;
        }
    ';
        wp_register_style( 'custom-customizer-inline-style', false );
        wp_enqueue_style( 'custom-customizer-inline-style' );

        wp_add_inline_style( 'custom-customizer-inline-style', $custom_css );
    }
);