feat: enable PostOnly orders for binance futures

Author: xmatthias

freqtrade/exchange/binance.py

@@ -45,7 +45,6 @@ class Binance(Exchange):
         "funding_fee_candle_limit": 1000,
         "stoploss_order_types": {"limit": "stop", "market": "stop_market"},
         "stoploss_blocks_assets": False,  # Stoploss orders do not block assets
-        "order_time_in_force": ["GTC", "FOK", "IOC"],
         "tickers_have_price": False,
         "floor_leverage": True,
         "fetch_orders_limit_minutes": 7 * 1440,  # "fetch_orders" is limited to 7 days