Empty string not needed for NodeCache init

Author: bouwew

plugwise_usb/network/__init__.py

@@ -546,7 +546,7 @@ async def energy_reset_request(self, mac: str) -> None:
 
         # Clear the cached energy_collection
         if self._cache_enabled:
-            node_cache = NodeCache(mac, "")
+            node_cache = NodeCache(mac)
             node_cache.update_state(CACHE_ENERGY_COLLECTION, "")
             await node_cache.save_cache()