function plt_hide_open_graphite_menus() {
//Hide the "Open Graphite" menu.
remove_menu_page('open-graphite-settings');
//Hide the "Open Graphite → Open Graphite" menu.
remove_submenu_page('open-graphite-settings', 'open-graphite-settings');
//Hide the "Open Graphite → Help" menu.
remove_submenu_page('open-graphite-settings', 'open-graphite-help');
}
add_action('admin_menu', 'plt_hide_open_graphite_menus', 11);