nothing I do removes payment-history brick

This is my copied and pasted site.php file, please let me know what I need to paste into this to remove payment history brick. I've tried everything on every forum, and every time it 1.) does not remove any brick 2.) generates a php error on line 15. This is the clean (unmodified) site.php file. Please help me and thank you in advanced

<?php
if (!defined('INCLUDED_AMEMBER_CONFIG'))
die("Direct access to this location is not allowed");

/*
* aMember Pro site customization file
*
* Rename this file to site.php and put your site customizations,
* such as fields additions, custom hooks and so on to this file
* This file will not be overwritten during upgrade
*

Just so we are clear, I've already tried:

Am_Di::getInstance()->hook->add(Am_Event::USER_MENU, ‘onUserMenu’);
function onUserMenu(Am_Event $event)
{
//remove a tab
$menu = $event->getMenu();
$page = $menu->findOneBy(‘id’, ‘payment-history’);
$menu->removePage($page);
}

And I've tried (from the amember documentation):

// Remove a tab
$page = $menu->findOneBy('id', 'payment-history');
$menu->removePage($page);

Thank you Caesar! Worked perfectly.