function plt_hide_inazo_flamingo_automatically_delete_old_messages_menus() {
//Hide the "Settings → Flamingo auto trash" menu.
remove_submenu_page('options-general.php', 'inazo.flamingo.auto.trash.config');
}
add_action('admin_menu', 'plt_hide_inazo_flamingo_automatically_delete_old_messages_menus', 11);