also remove all __future__ usage

Author: radix

README.rst

@@ -44,7 +44,6 @@ A very quick example of using Effects:
 
 .. code:: python
 
-    from __future__ import print_function
     from effect import sync_perform, sync_performer, Effect, TypeDispatcher
 
     class ReadLine(object):

effect/__init__.py

@@ -7,8 +7,6 @@
 See https://effect.readthedocs.org/ for documentation.
 """
 
-from __future__ import absolute_import
-
 from ._base import Effect, perform, NoPerformerFoundError, catch, raise_
 from ._sync import (
     NotSynchronousError,

effect/_base.py

@@ -1,6 +1,4 @@
 # -*- test-case-name: effect.test_base -*-
-from __future__ import print_function, absolute_import
-
 from functools import partial
 
 import attr

effect/_intents.py

@@ -8,9 +8,6 @@
 performed, sunch as :class:`Func`, :class:`Error`, and :class:`Constant`.
 """
 
-
-from __future__ import print_function, absolute_import
-
 import time
 
 import attr

effect/do.py

@@ -4,9 +4,6 @@
 See :func:`do`.
 """
 
-
-from __future__ import print_function
-
 import types
 
 from . import Effect, Func

effect/io.py

@@ -4,7 +4,6 @@
 :obj:`Prompt` that uses built-in Python standard io facilities.
 """
 
-from __future__ import print_function
 import attr
 
 from . import sync_performer, TypeDispatcher

effect/test_async.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 from testtools.testcase import TestCase
 
 from ._base import Effect, perform

effect/test_base.py

@@ -1,5 +1,3 @@
-from __future__ import print_function, absolute_import
-
 import traceback
 
 from testtools import TestCase

effect/test_intents.py

@@ -1,5 +1,3 @@
-from __future__ import print_function, absolute_import
-
 from functools import partial
 
 from testtools import TestCase

effect/test_threads.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 from functools import partial
 
 from multiprocessing.pool import ThreadPool