Allow None agent in conversation (#63761)

homeassistant/components/almond/__init__.py

@@ -221,7 +221,7 @@ async def _configure_almond_for_ha(
             await hass.auth.async_remove_refresh_token(token)
 
 
-async def async_unload_entry(hass, entry):
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload Almond."""
     conversation.async_set_agent(hass, None)
     return True

homeassistant/components/conversation/__init__.py

@@ -1,4 +1,6 @@
 """Support for functionality to have conversations with Home Assistant."""
+from __future__ import annotations
+
 from http import HTTPStatus
 import logging
 import re
@@ -48,7 +50,7 @@ async_register = bind_hass(async_register)
 
 @core.callback
 @bind_hass
-def async_set_agent(hass: core.HomeAssistant, agent: AbstractConversationAgent):
+def async_set_agent(hass: core.HomeAssistant, agent: AbstractConversationAgent | None):
     """Set the agent to handle the conversations."""
     hass.data[DATA_AGENT] = agent