Fix phpmailer-lite bug

Summary: Fixes T4417. In this particular codepath, the lovely CreateHeader already added the to: information, so no need to slap it on the front all ghetto style.

Test Plan: imma push this live and test (I am lazy and don't want to configure amazon ses)

Reviewers: epriestley

CC: Korvin, epriestley, aran

Maniphest Tasks: T4417

Differential Revision: https://secure.phabricator.com/D8288

Author: bobtrahan

externals/phpmailer/class.phpmailer-lite.php

@@ -491,13 +491,7 @@ public function Send() {
       switch($this->Mailer) {
 
         case 'amazon-ses':
-          $toArr = array();
-          foreach($this->to as $t) {
-            $toArr[] = $this->AddrFormat($t);
-          }
-          $to = implode(', ', $toArr);
           return $this->customMailer->executeSend(
-            "To: ".$to."\n".
             $header.
             $body);