Disable polling for ozw entities (#38005)

homeassistant/components/ozw/entity.py

@@ -247,6 +247,11 @@ class ZWaveDeviceEntity(Entity):
         self.on_value_update()
         self.async_write_ha_state()
 
+    @property
+    def should_poll(self):
+        """No polling needed."""
+        return False
+
     async def _delete_callback(self, values_id):
         """Remove this entity."""
         if not self.values: