Merge "remove invalid note"

keystone/auth/routers.py

@@ -22,10 +22,6 @@ class Routers(wsgi.RoutersBase):
     def append_v3_routers(self, mapper, routers):
         auth_controller = controllers.Auth()
 
-        # NOTE(morganfainberg): For policy enforcement reasons, the
-        # ``validate_token_head`` method is still used for HEAD requests.
-        # The controller method makes the same call as the validate_token
-        # call and lets wsgi.render_response remove the body data.
         self._add_resource(
             mapper, auth_controller,
             path='/auth/tokens',