Disable PMPro Checkout Confirmation Emails

my_pmpro_email_recipient.php

/*
	Disable PMPro Checkout Confirmation Emails
	
	Add this code to your active theme's fucntions.php
	or a custom plugin.
*/
function my_pmpro_email_recipient($recipient, $email)
{
	if(strpos($email->template, "checkout_") !== false)
	  $recipient = NULL;
	  
	return $recipient;
}
add_filter("pmpro_email_recipient", "my_pmpro_email_recipient", 10, 2);