function plt_hide_all_in_one_event_calendar_menus() {
//Hide the "Time.ly" menu.
remove_menu_page('timely');
//Hide the "Time.ly → Sign In" menu.
remove_submenu_page('timely', 'timely_signin');
}
add_action('admin_menu', 'plt_hide_all_in_one_event_calendar_menus', 11);