forgot to remove useles import

git-svn-id: https://svn.erp5.org/repos/public/erp5/sandbox/portal_types@29493 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/MailMessage.py

@@ -30,7 +30,6 @@
 from Products.ERP5Type.Globals import InitializeClass
 from AccessControl import ClassSecurityInfo
 
-from Products.CMFMailIn.MailMessage import MailMessage as CMFMailInMessage
 from Products.ERP5Type import Permissions, PropertySheet, Constraint, interfaces
 
 from Products.ERP5.Document.Event import Event