Clean up notifiy component

homeassistant/components/notify/file.py

@@ -20,14 +20,14 @@ _LOGGER = logging.getLogger(__name__)
 def get_service(hass, config):
     """ Get the file notification service. """
 
-    if not validate_config(config,
+    if not validate_config({DOMAIN: config},
                            {DOMAIN: ['filename',
                                      'timestamp']},
                            _LOGGER):
         return None
 
-    filename = config[DOMAIN]['filename']
-    timestamp = config[DOMAIN]['timestamp']
+    filename = config['filename']
+    timestamp = config['timestamp']
 
     return FileNotificationService(hass, filename, timestamp)