remove more Python2 compatibility
diff --git a/lib/py/src/TTornado.py b/lib/py/src/TTornado.py
index 5eff11d..c409e09 100644
--- a/lib/py/src/TTornado.py
+++ b/lib/py/src/TTornado.py
@@ -17,7 +17,6 @@
 # under the License.
 #
 
-from __future__ import absolute_import
 import logging
 import socket
 import struct
@@ -34,7 +33,7 @@
 logger = logging.getLogger(__name__)
 
 
-class _Lock(object):
+class _Lock:
     def __init__(self):
         self._waiters = deque()