Remove `from __future__ import with_statement`

demos/demo_keygen.py

@@ -17,7 +17,6 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with Paramiko; if not, write to the Free Software Foundation, Inc.,
 # 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
-from __future__ import with_statement
 
 import sys
 

demos/demo_sftp.py

@@ -20,8 +20,6 @@
 
 # based on code provided by raymond mosteller (thanks!)
 
-from __future__ import with_statement
-
 import base64
 import getpass
 import os

paramiko/win_pageant.py

@@ -21,8 +21,6 @@
 Functions for communicating with Pageant, the basic windows ssh agent program.
 """
 
-from __future__ import with_statement
-
 import struct
 import threading
 import array

tests/test_sftp.py

@@ -23,8 +23,6 @@ a real actual sftp server is contacted, and a new folder is created there to
 do test file operations in (so no existing files will be harmed).
 """
 
-from __future__ import with_statement
-
 from binascii import hexlify
 import os
 import warnings