Use depends on methods for carrier context

issue9492
review304001003

stock.py

@@ -43,8 +43,7 @@ class ShipmentOut(metaclass=PoolMeta):
     def on_change_carrier(self):
         self.on_change_inventory_moves()
 
-    @fields.depends('carrier', 'customer', 'inventory_moves',
-        methods=['_get_carrier_context'])
+    @fields.depends('carrier', methods=['_get_carrier_context'])
     def on_change_inventory_moves(self):
         try:
             super(ShipmentOut, self).on_change_inventory_moves()