removing menus try 2

function remove_submenu() {
global $submenu;
//remove Theme editor
unset($submenu['themes.php'][10]);
}
 
function remove_menu() {
global $menu;
//remove post top level menu
unset($menu[5]);
}
add_action('admin_head', 'remove_menu');
add_action('admin_head', 'remove_submenu');