erp5_item: Update quantity unconditionally

Since Movement_isQuantityEditable does not say anything about Item related
movements, there is no reason to use any condition while updating
quantities.

bt5/erp5_item/SkinTemplateItem/portal_skins/erp5_item_trade/DeliveryLine_createItemList.py

@@ -80,13 +80,11 @@ for line in kw.get('listbox'):
         movement_to_update.getAggregateValueList() + [item])
 
 
-update_quantity = not context.Movement_isQuantityEditable()
-if update_quantity:
-  if context.isMovement():
+if context.isMovement():
   movement_list = context,
-  else:
+else:
   movement_list = context.getCellValueList(base_id='movement')
-  for movement in movement_list:
+for movement in movement_list:
   quantity = 0
   item_list = movement.getAggregateValueList()
   for item in item_list:

bt5/erp5_item/SkinTemplateItem/portal_skins/erp5_item_trade/DeliveryLine_selectItemList.py

@@ -92,13 +92,11 @@ for item_uid in uids:
   movement_to_update.setAggregateValueSet(
       movement_to_update.getAggregateValueList() + [item])
 
-update_quantity = not context.Movement_isQuantityEditable()
-if update_quantity:
-  if context.isMovement():
+if context.isMovement():
   movement_list = context,
-  else:
+else:
   movement_list = context.getCellValueList(base_id='movement')
-  for movement in movement_list:
+for movement in movement_list:
   quantity = 0
   item_list = movement.getAggregateValueList()
   for item in item_list: