Improve login-mixin structure

freqtrade/plugins/protections/cooldown_period.py

@@ -1,6 +1,6 @@
 
 import logging
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timedelta
 from typing import Any, Dict
 
 from freqtrade.persistence import Trade
@@ -46,7 +46,7 @@ class CooldownPeriod(IProtection):
         ]
         trade = Trade.get_trades(filters).first()
         if trade:
-            self.log_once(logger.info, f"Cooldown for {pair} for {self._stop_duration}.")
+            self.log_once(f"Cooldown for {pair} for {self._stop_duration}.", logger.info)
             until = self.calculate_lock_end([trade], self._stop_duration)
 
             return True, until, self._reason()