Zend_Mail. Fixed a redundant line in API docs I added 2 mins ago (my bad)

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@18564 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Mail.php

@@ -656,7 +656,6 @@ class Zend_Mail extends Zend_Mime_Message
 
     /**
      * Returns the current Reply-To address of the message
-     * If no Reply-To header is set, returns the value of {@link $_from}.
      *
      * @return string|null Reply-To address, null when not set
      */