crm : remove not existing property

bt5/erp5_crm/SkinTemplateItem/portal_skins/erp5_crm/NotificationMessage_getSubstitutionMappingDictFromEvent.xml

@@ -66,7 +66,6 @@ def getSubstitutionMappingDict():\n
     kw[\'telephone\'] = destination.getDefaultTelephoneText() or \'\'\n
     kw[\'mobile\'] = destination.getMobileTelephoneText() or \'\'\n
     kw[\'creation_date\'] = destination.getCreationDate()\n
-    kw[\'origin_campaign\'] = destination.getOriginReference()\n
 \n
     if destination.getPortalType() == \'Person\':\n
       kw[\'first_name\'] = destination.getFirstName()\n