Remove a useless expression.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@38184 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/OrderBuilder.py

@@ -150,7 +150,7 @@ class OrderBuilder(XMLObject, Amount, Predicate):
     """
     delivery_module_before_building_script_id = \
         self.getDeliveryModuleBeforeBuildingScriptId()
-    if delivery_module_before_building_script_id not in ["", None]:
+    if delivery_module_before_building_script_id:
       delivery_module = getattr(self.getPortalObject(), self.getDeliveryModule())
       getattr(delivery_module, delivery_module_before_building_script_id)()