Use dataclass instead of attr slots for mqtt PublishMessage and ReceiveMessage (#101062)

Use dataclass instead of attr slots

homeassistant/components/mqtt/models.py

@@ -11,8 +11,6 @@ from enum import StrEnum
 import logging
 from typing import TYPE_CHECKING, Any, TypedDict
 
-import attr
-
 from homeassistant.const import ATTR_ENTITY_ID, ATTR_NAME
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.helpers import template
@@ -44,26 +42,26 @@ ATTR_THIS = "this"
 PublishPayloadType = str | bytes | int | float | None
 
 
-@attr.s(slots=True, frozen=True)
+@dataclass
 class PublishMessage:
-    """MQTT Message."""
+    """MQTT Message for publishing."""
 
-    topic: str = attr.ib()
-    payload: PublishPayloadType = attr.ib()
-    qos: int = attr.ib()
-    retain: bool = attr.ib()
+    topic: str
+    payload: PublishPayloadType
+    qos: int
+    retain: bool
 
 
-@attr.s(slots=True, frozen=True)
+@dataclass
 class ReceiveMessage:
-    """MQTT Message."""
+    """MQTT Message received."""
 
-    topic: str = attr.ib()
-    payload: ReceivePayloadType = attr.ib()
-    qos: int = attr.ib()
-    retain: bool = attr.ib()
-    subscribed_topic: str = attr.ib(default=None)
-    timestamp: dt.datetime = attr.ib(default=None)
+    topic: str
+    payload: ReceivePayloadType
+    qos: int
+    retain: bool
+    subscribed_topic: str
+    timestamp: dt.datetime
 
 
 AsyncMessageCallbackType = Callable[[ReceiveMessage], Coroutine[Any, Any, None]]