WPML Language Switcher

Hi,
I use this code in fonction.php (topic https://kriesi.at/support/topic/wpml-language-switcher-8/#post-588831) to disable language switcher configuration. But it don’t work. Have you an other solution ?

add_action(‘after_setup_theme’,’avia_remove_main_menu_flags’);
function avia_remove_main_menu_flags(){
remove_filter( ‘wp_nav_menu_items’, ‘avia_append_lang_flags’, 20, 2 );
remove_filter( ‘avf_fallback_menu_items’, ‘avia_append_lang_flags’, 20, 2 );
remove_action( ‘avia_meta_header’, ‘avia_wpml_language_switch’, 10);
}