Remove unnecessary should poll from binary sensor classes (#41221)

homeassistant/components/maxcube/binary_sensor.py

@@ -38,11 +38,6 @@ class MaxCubeShutter(BinarySensorEntity):
         self._cubehandle = handler
         self._state = None
 
-    @property
-    def should_poll(self):
-        """Return the polling state."""
-        return True
-
     @property
     def name(self):
         """Return the name of the BinarySensorEntity."""