Remove python 2.5 compatibility code.

R=cmp@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/10165007

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@133265 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/subprocess2.py b/subprocess2.py
index ef95d6f..043194f 100644
--- a/subprocess2.py
+++ b/subprocess2.py
@@ -1,5 +1,5 @@
 # coding=utf8
-# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """Collection of subprocess wrapper functions.
@@ -7,7 +7,6 @@
 In theory you shouldn't need anything else in subprocess, or this module failed.
 """
 
-from __future__ import with_statement
 import cStringIO
 import errno
 import logging