function plt_hide_woocommerce_google_adwords_conversion_tracking_tag_menus() {
//Hide the "Settings → Pixel Manager 3" menu.
remove_submenu_page('options-general.php', 'pmw');
}
add_action('admin_menu', 'plt_hide_woocommerce_google_adwords_conversion_tracking_tag_menus', 1000000000);