Remove some from __future__ import with_statements

Lib/calendar.py

@@ -5,7 +5,6 @@ default, these calendars have Monday as the first day of the week, and
 Sunday as the last (the European convention). Use setfirstweekday() to
 set the first day of the week (0=Monday, 6=Sunday)."""
 
-from __future__ import with_statement
 import sys
 import datetime
 import locale as _locale

Lib/test/test_cmd_line_script.py

 # Tests command line execution of scripts
-from __future__ import with_statement
 
 import unittest
 import os

Lib/test/test_contextlib.py

 """Unit tests for contextlib.py, and other context managers."""
 
-from __future__ import with_statement
 
 import sys
 import os

Lib/test/test_decimal.py

@@ -23,7 +23,6 @@ or Behaviour) to test each part, or without parameter to test both parts. If
 you're working through IDLE, you can import this test module and call test_main()
 with the corresponding argument.
 """
-from __future__ import with_statement
 
 import glob
 import math

Lib/test/test_frozen.py

 # Test the frozen module defined in frozen.c.
-from __future__ import with_statement
 
 from test.test_support import captured_stdout, run_unittest
 import unittest

Lib/test/test_tempfile.py

 # tempfile.py unit tests.
-from __future__ import with_statement
 import tempfile
 import os
 import sys

Lib/test/test_with.py

@@ -2,7 +2,6 @@
 
 """Unit tests for the with statement specified in PEP 343."""
 
-from __future__ import with_statement
 
 __author__ = "Mike Bland"
 __email__ = "mbland at acm dot org"