remove the annoying customizer admin panel

php

function as_remove_menus () {
       remove_menu_page('upload.php'); //hide Media
       remove_menu_page('link-manager.php'); //hide links
       remove_submenu_page( 'edit.php', 'edit-tags.php' ); //hide tags
       global $submenu;
        // Appearance Menu
        unset($submenu['themes.php'][6]); // Customize
}
add_action('admin_menu', 'as_remove_menus');