No longer send welcome mail from a real user.

Summary: Remove lines that set from field.

Test Plan: Check that emails are sent without from field.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin, AnhNhan

Differential Revision: https://secure.phabricator.com/D5845

src/applications/people/storage/PhabricatorUser.php

@@ -590,7 +590,6 @@ EOBODY;
       ->addTos(array($this->getPHID()))
       ->setSubject('[Phabricator] Welcome to Phabricator')
       ->setBody($body)
-      ->setFrom($admin->getPHID())
       ->saveAndSend();
   }
 
@@ -630,7 +629,6 @@ EOBODY;
       ->addTos(array($this->getPHID()))
       ->setSubject('[Phabricator] Username Changed')
       ->setBody($body)
-      ->setFrom($admin->getPHID())
       ->saveAndSend();
   }