from tornado.httpserver import HTTPServer
from tornado.httputil import HTTPHeaders, HTTPMessageDelegate, HTTPServerConnectionDelegate, ResponseStartLine
from tornado.iostream import IOStream
-from tornado.log import gen_log, app_log
+from tornado.log import gen_log
from tornado.netutil import ssl_options_to_context
from tornado.simple_httpclient import SimpleAsyncHTTPClient
from tornado.testing import AsyncHTTPTestCase, AsyncHTTPSTestCase, AsyncTestCase, ExpectLog, gen_test
from tornado.httpclient import AsyncHTTPClient
from tornado.httputil import HTTPHeaders
from tornado.ioloop import IOLoop
-from tornado.log import gen_log, app_log
+from tornado.log import gen_log
from tornado.netutil import Resolver, bind_sockets
from tornado.simple_httpclient import SimpleAsyncHTTPClient, _default_ca_certs
from tornado.test.httpclient_test import ChunkHandler, CountdownHandler, HelloWorldHandler