Isort preparations (#16555)

* Don't treat typing as an "in-between" module for import order

That was a < 3.5 era thing.

* Tighten scope of some pylint unused-import disables

To avoid isort moving a top level one around, undesirably broadening its
scope.

homeassistant/helpers/json.py

@@ -2,7 +2,6 @@
 from datetime import datetime
 import json
 import logging
-
 from typing import Any
 
 _LOGGER = logging.getLogger(__name__)