Improve type hint in webostv trigger (#88599)

Improve type hint in webostv trigger

homeassistant/components/webostv/trigger.py

@@ -5,24 +5,28 @@ from typing import cast
 
 from homeassistant.const import CONF_PLATFORM
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant
-from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
+from homeassistant.helpers.trigger import (
+    TriggerActionType,
+    TriggerInfo,
+    TriggerProtocol,
+)
 from homeassistant.helpers.typing import ConfigType
 
-from .triggers import TriggersPlatformModule, turn_on
+from .triggers import turn_on
 
 TRIGGERS = {
     "turn_on": turn_on,
 }
 
 
-def _get_trigger_platform(config: ConfigType) -> TriggersPlatformModule:
+def _get_trigger_platform(config: ConfigType) -> TriggerProtocol:
     """Return trigger platform."""
     platform_split = config[CONF_PLATFORM].split(".", maxsplit=1)
     if len(platform_split) < 2 or platform_split[1] not in TRIGGERS:
         raise ValueError(
             f"Unknown webOS Smart TV trigger platform {config[CONF_PLATFORM]}"
         )
-    return cast(TriggersPlatformModule, TRIGGERS[platform_split[1]])
+    return cast(TriggerProtocol, TRIGGERS[platform_split[1]])
 
 
 async def async_validate_trigger_config(
@@ -41,10 +45,4 @@ async def async_attach_trigger(
 ) -> CALLBACK_TYPE:
     """Attach trigger of specified platform."""
     platform = _get_trigger_platform(config)
-    assert hasattr(platform, "async_attach_trigger")
-    return cast(
-        CALLBACK_TYPE,
-        await getattr(platform, "async_attach_trigger")(
-            hass, config, action, trigger_info
-        ),
-    )
+    return await platform.async_attach_trigger(hass, config, action, trigger_info)

homeassistant/components/webostv/triggers/__init__.py

@@ -1,12 +1 @@
 """webOS Smart TV triggers."""
-from __future__ import annotations
-
-from typing import Protocol
-
-import voluptuous as vol
-
-
-class TriggersPlatformModule(Protocol):
-    """Protocol type for the triggers platform."""
-
-    TRIGGER_SCHEMA: vol.Schema