Remove returntype

freqtrade/persistence/migrations.py

@@ -209,9 +209,6 @@ def check_migrate(engine, decl_base, previous_tables) -> None:
                     f"backup: {table_back_name}, {order_table_bak_name}")
         migrate_trades_and_orders_table(
             decl_base, inspector, engine, table_back_name, cols, order_table_bak_name, cols_orders)
-        # Reread columns - the above recreated the table!
-        inspector = inspect(engine)
-        cols = inspector.get_columns('trades')
 
     if 'orders' not in previous_tables and 'trades' in previous_tables:
         logger.info('Moving open orders to Orders table.')

freqtrade/persistence/models.py

@@ -160,7 +160,7 @@ class Order(_DECL_BASE):
         return (f'Order(id={self.id}, order_id={self.order_id}, trade_id={self.ft_trade_id}, '
                 f'side={self.side}, order_type={self.order_type}, status={self.status})')
 
-    def update_from_ccxt_object(self, order) -> 'Order':
+    def update_from_ccxt_object(self, order):
         """
         Update Order from ccxt response
         Only updates if fields are available from ccxt -