deviceEigerP11.py: remove useless attribute

kamzik3/devices/deviceEigerP11.py

@@ -276,7 +276,6 @@ class EigerScanner(DeviceScanner):
         config: Optional[Dict[str, Any]] = None,
     ):
         self.detector = detector
-        self.scanned_devices = []
         DeviceScanner.__init__(self, device_id, config)
         self.connect()