function plt_hide_oembed_manager_menus() {
//Hide the "PerfOps One" menu.
remove_menu_page('perfopsone-dashboard');
//Hide the "PerfOps One → Control Center" menu.
remove_submenu_page('perfopsone-dashboard', 'perfopsone-dashboard');
//Hide the "PerfOps One → Tools" menu.
remove_submenu_page('perfopsone-dashboard', 'perfopsone-tools');
}
add_action('admin_menu', 'plt_hide_oembed_manager_menus', 111);