diff --git a/sjrpc/core/rpcconnection.py b/sjrpc/core/rpcconnection.py
index 57664a665dc9d19d102bfb0e5309d589dfba0807..de22c4bb8b55dbef8eaa91583d56635e515bf6a3 100644
--- a/sjrpc/core/rpcconnection.py
+++ b/sjrpc/core/rpcconnection.py
@@ -9,7 +9,6 @@ from __future__ import absolute_import
 import ssl
 import struct
 import socket
-import select
 import logging
 
 from sjrpc.core.protocols.rpc import RpcProtocol
@@ -55,9 +54,6 @@ class RpcConnection(object):
     MESSAGE_HEADER = '!HL'
     MESSAGE_HEADER_FALLBACK = '!L'
     SHORTCUTS_MAINRPC = ('call', 'async_call')
-    IOW_EVENTS = {'read': select.POLLIN | select.POLLPRI,
-                  'write': select.POLLOUT, 'hup': select.POLLHUP,
-                  'error': select.POLLERR | select.POLLNVAL}
 
     def __init__(self, sock, loop=None, enable_tcp_keepalive=False,
                  *args, **kwargs):
@@ -164,12 +160,6 @@ class RpcConnection(object):
     def __nonzero__(self):
         return self._connected
 
-    def _enable_fallback(self):
-        pass
-
-    def _disable_fallback(self):
-        pass
-
     def _send_capabilities(self):
         '''
         Send capabilities to the peer, only work in fallback mode for