Remove check on remove deprecated call back for mqtt subscribe (home-…

…assistant#91464)

Remove check on deprecated callback wrapper

homeassistant/components/mqtt/client.py

@@ -4,7 +4,6 @@
 import asyncio
 from collections.abc import Callable, Coroutine, Iterable
 from functools import lru_cache
-import inspect
 from itertools import chain, groupby
 import logging
 from operator import attrgetter
@@ -172,25 +171,6 @@ async def async_subscribe(
             f"Cannot subscribe to topic '{topic}', MQTT is not enabled"
         )
     mqtt_data = get_mqtt_data(hass)
-    # Support for a deprecated callback type was removed with HA core 2023.3.0
-    # The signature validation code can be removed from HA core 2023.5.0
-    non_default = 0
-    if msg_callback:
-        non_default = sum(
-            p.default == inspect.Parameter.empty
-            for _, p in inspect.signature(msg_callback).parameters.items()
-        )
-
-    # Check for not supported callback signatures
-    # Can be removed from HA core 2023.5.0
-    if non_default != 1:
-        module = inspect.getmodule(msg_callback)
-        raise HomeAssistantError(
-            "Signature for MQTT msg_callback '{}.{}' is not supported".format(
-                module.__name__ if module else "<unknown>", msg_callback.__name__
-            )
-        )
-
     async_remove = await mqtt_data.client.async_subscribe(
         topic,
         catch_log_exception(

tests/components/mqtt/test_init.py

@@ -32,7 +32,6 @@
 from homeassistant.helpers import device_registry as dr, entity_registry as er, template
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.entity_platform import async_get_platforms
-from homeassistant.helpers.service_info.mqtt import ReceivePayloadType
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.setup import async_setup_component
 from homeassistant.util.dt import utcnow
@@ -946,46 +945,6 @@ async def test_subscribe_bad_topic(
         await mqtt.async_subscribe(hass, 55, record_calls)  # type: ignore[arg-type]
 
 
-# Support for a deprecated callback type was removed with HA core 2023.3.0
-# Test can be removed from HA core 2023.5.0
-async def test_subscribe_with_deprecated_callback_fails(
-    hass: HomeAssistant, mqtt_mock_entry: MqttMockHAClientGenerator
-) -> None:
-    """Test the subscription of a topic using deprecated callback signature fails."""
-    await mqtt_mock_entry()
-
-    async def record_calls(topic: str, payload: ReceivePayloadType, qos: int) -> None:
-        """Record calls."""
-
-    with pytest.raises(HomeAssistantError):
-        await mqtt.async_subscribe(hass, "test-topic", record_calls)
-    # Test with partial wrapper
-    with pytest.raises(HomeAssistantError):
-        await mqtt.async_subscribe(hass, "test-topic", RecordCallsPartial(record_calls))
-
-
-# Support for a deprecated callback type was removed with HA core 2023.3.0
-# Test can be removed from HA core 2023.5.0
-async def test_subscribe_deprecated_async_fails(
-    hass: HomeAssistant, mqtt_mock_entry: MqttMockHAClientGenerator
-) -> None:
-    """Test the subscription of a topic using deprecated coroutine signature fails."""
-    await mqtt_mock_entry()
-
-    @callback
-    def async_record_calls(topic: str, payload: ReceivePayloadType, qos: int) -> None:
-        """Record calls."""
-
-    with pytest.raises(HomeAssistantError):
-        await mqtt.async_subscribe(hass, "test-topic", async_record_calls)
-
-    # Test with partial wrapper
-    with pytest.raises(HomeAssistantError):
-        await mqtt.async_subscribe(
-            hass, "test-topic", RecordCallsPartial(async_record_calls)
-        )
-
-
 async def test_subscribe_topic_not_match(
     hass: HomeAssistant,
     mqtt_mock_entry: MqttMockHAClientGenerator,