[IMP] remove not used dependencies

Author: mathieuvatel

account_payment_export/wizard/export_wizard.py

@@ -22,8 +22,6 @@
 import base64
 from openerp.osv import orm, fields
 import time
-import mx.DateTime
-from mx.DateTime import RelativeDateTime, now, DateTime, localtime
 from openerp.tools.translate import _
 
 trans=[(u'ￃﾩ','e'),