Remove use_2to3 from setup

setup.py

@@ -1,10 +1,6 @@
 from setuptools import setup
 import sys
 
-python3_setup = {}
-if sys.version_info >= (3,):
-    python3_setup['use_2to3'] = True
-
 setup(
     name='iron-worker',
     py_modules=["iron_worker"],
@@ -41,5 +37,4 @@
 IronWorker is a background processing and task queuing system that lets your 
 applications use the cloud to do their heavy lifting. Find out more at 
 http://www.iron.io/products/worker.""",
-    **python3_setup
 )