*: Remove Python2 __future__ imports throughout the codebase

Author: bdarnell

demos/file_upload/file_uploader.py

@@ -9,7 +9,6 @@
 See also file_receiver.py in this directory, a server that receives uploads.
 """
 
-from __future__ import print_function
 import mimetypes
 import os
 import sys

demos/tcpecho/client.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 from tornado.ioloop import IOLoop
 from tornado import gen
 from tornado.tcpclient import TCPClient

maint/circlerefs/circlerefs.py

@@ -7,7 +7,6 @@
 increases memory footprint and CPU overhead, so we try to eliminate
 circular references created by normal operation.
 """
-from __future__ import print_function
 
 import gc
 import traceback

maint/scripts/test_resolvers.py

@@ -1,6 +1,4 @@
 #!/usr/bin/env python
-from __future__ import print_function
-
 import pprint
 import socket
 

maint/vm/windows/bootstrap.py

@@ -21,7 +21,6 @@
 To run under cygwin (which must be installed separately), run
   cd /cygdrive/e; python -m tornado.test.runtests
 """
-from __future__ import absolute_import, division, print_function
 
 import os
 import subprocess

tornado/__init__.py

@@ -15,8 +15,6 @@
 
 """The Tornado web server and tools."""
 
-from __future__ import absolute_import, division, print_function
-
 # version is a human-readable version number.
 
 # version_info is a four-tuple for programmatic comparison. The first

tornado/_locale_data.py

@@ -16,8 +16,6 @@
 
 """Data used by the tornado.locale module."""
 
-from __future__ import absolute_import, division, print_function
-
 LOCALE_NAMES = {
     "af_ZA": {"name_en": u"Afrikaans", "name": u"Afrikaans"},
     "am_ET": {"name_en": u"Amharic", "name": u"አማርኛ"},

tornado/auth.py

@@ -56,8 +56,6 @@ async def get(self):
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import base64
 import binascii
 import hashlib

tornado/autoreload.py

@@ -43,8 +43,6 @@
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import os
 import sys
 

tornado/concurrent.py

@@ -26,7 +26,6 @@
 implementation, applications rarely need to interact with it
 directly.
 """
-from __future__ import absolute_import, division, print_function
 
 import asyncio
 from concurrent import futures