chore: fix diagnostic lint issues

Author: allenporter

roborock/devices/device_manager.py

@@ -4,7 +4,7 @@
 import enum
 import logging
 from collections.abc import Callable, Mapping
-from dataclasses import asdict, dataclass
+from dataclasses import dataclass
 from typing import Any
 
 import aiohttp

roborock/diagnostics.py

@@ -106,13 +106,12 @@ def reset(self) -> None:
     "name",
     "productId",
     "ipAddress",
-    "mac",
     "wifiName",
     "lat",
     "long",
 }
 KEEP_KEYS = {
-    # Product information no unique per user
+    # Product information not unique per user
     "product.id",
     "product.schema.id",
     "product.schema.name",