Fix broken reference

rpi/services/game_service.py

@@ -8,7 +8,6 @@ from models.exceptions.ServiceException import ServiceException
 from models.game import Game
 from services.clock_service import ClockService
 
-
 class GameService:
 
     _game : Game
@@ -41,7 +40,6 @@ class GameService:
 
     def stop(self):
         self._clock_service.stop()
-        self._detection_service.stop()
         self._led.off()
         self._notify()
         self._has_started = False