diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 72c695ce9c..85136d9b04 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -265,8 +265,6 @@ class Auth(object):
 
             request.authenticated_entity = user.to_string()
             opentracing.set_tag("authenticated_entity", user.to_string())
-            # there is at least one other place where authenticated entity is
-            # set.
 
             return synapse.types.create_requester(
                 user, token_id, is_guest, device_id, app_service=app_service