[FIX]Delivery: carrier information not propagated from sale order to …

…pickings (Case: ref 595240)

closes lp:1192115

addons/delivery/sale.py

@@ -72,8 +72,7 @@ def delivery_set(self, cr, uid, ids, context=None):
                 'tax_id': [(6,0,taxes_ids)],
                 'type': 'make_to_stock'
             })
-        #remove the value of the carrier_id field on the sale order
-        return self.write(cr, uid, ids, {'carrier_id': False}, context=context)
+        return True
         #return {'type': 'ir.actions.act_window_close'} action reload?
 
 sale_order()