Remove listening to homeassistant_start with event automation (#7474)

homeassistant/components/automation/event.py

@@ -9,8 +9,8 @@ import logging
 
 import voluptuous as vol
 
-from homeassistant.core import callback, CoreState
-from homeassistant.const import CONF_PLATFORM, EVENT_HOMEASSISTANT_START
+from homeassistant.core import callback
+from homeassistant.const import CONF_PLATFORM
 from homeassistant.helpers import config_validation as cv
 
 CONF_EVENT_TYPE = 'event_type'
@@ -31,19 +31,6 @@ def async_trigger(hass, config, action):
     event_type = config.get(CONF_EVENT_TYPE)
     event_data = config.get(CONF_EVENT_DATA)
 
-    if (event_type == EVENT_HOMEASSISTANT_START and
-            hass.state == CoreState.starting):
-        _LOGGER.warning('Deprecation: Automations should not listen to event '
-                        "'homeassistant_start'. Use platform 'homeassistant' "
-                        'instead. Feature will be removed in 0.45')
-        hass.async_run_job(action, {
-            'trigger': {
-                'platform': 'event',
-                'event': None,
-            },
-        })
-        return lambda: None
-
     @callback
     def handle_event(event):
         """Listen for events and calls the action when data matches."""