receiver: don't emit warning for battery status notifications

lib/logitech_receiver/notifications.py

@@ -255,6 +255,9 @@ def _process_feature_notification(device, status, n, feature):
             discharge_next_level = ord(n.data[1:2])
             battery_status = ord(n.data[2:3])
             status.set_battery_info(discharge_level, _hidpp20.BATTERY_STATUS[battery_status], discharge_next_level)
+        elif n.address == 0x10:
+            if _log.isEnabledFor(_INFO):
+                _log.info('%s: spurious BATTERY status %s', device, n)
         else:
             _log.warn('%s: unknown BATTERY %s', device, n)
         return True