Use the dataclass decorator from dataclasses

We are not using the `.Schema` attribute from marshmallow_dataclass, so
it is better to just stick to the standard `dataclass` decorator to make
thing simpler.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

RELEASE_NOTES.md

@@ -11,7 +11,12 @@
     * Renamed to `LoggingConfigUpdatingActor` to follow the actor naming convention.
     * Make all arguments to the constructor keyword-only.
 
-- The `LoggingConfig.load` method was removed. Please use `frequenz.sdk.config.load_config()` instead.
+- `LoggingConfig`
+
+    * The `load()` method was removed. Please use `frequenz.sdk.config.load_config()` instead.
+    * The class is now a standard `dataclass` instead of a `marshmallow_dataclass`.
+
+- `LoggerConfig` is not a standard `dataclass` instead of a `marshmallow_dataclass`.
 
 ## New Features
 

src/frequenz/sdk/config/_logging_actor.py

@@ -5,13 +5,12 @@
 
 import logging
 from collections.abc import Mapping
-from dataclasses import field
+from dataclasses import dataclass, field
 from typing import Annotated, Any
 
 import marshmallow
 import marshmallow.validate
 from frequenz.channels import Receiver
-from marshmallow_dataclass import dataclass
 
 from ..actor import Actor
 from ._util import load_config