remove section and panel in wordpress customizer

function numag_remove_sections( $wp_customize ) {

$wp_customize->remove_section('header_image');

$wp_customize->remove_panel('nav_menus');

$wp_customize->remove_panel('widgets');

$wp_customize->remove_panel('generatepress_upsell_section');

$wp_customize->remove_section('custom_css');

$wp_customize->remove_section('colors'); //not working

//$wp_customize->remove_section('background_image');

//$wp_customize->remove_section('static_front_page');

$wp_customize->remove_section('title_tagline'); //site identity remove

}

add_action( 'customize_register', 'numag_remove_sections', 20);