Remove legacy "from __future__ import with_statement" lines.

Doc/tools/rstlint.py

@@ -9,8 +9,6 @@
 # TODO: - wrong versions in versionadded/changed
 #       - wrong markup after versionchanged directive
 
-from __future__ import with_statement
-
 import os
 import re
 import sys

Lib/lib2to3/refactor.py

@@ -8,8 +8,6 @@ recursively descend down directories.  Imported as a module, this
 provides infrastructure to write your own refactoring tool.
 """
 
-from __future__ import with_statement
-
 __author__ = "Guido van Rossum <guido@python.org>"
 
 

Lib/lib2to3/tests/test_parser.py

@@ -6,8 +6,6 @@ parts of the grammar we've changed, we also make sure we can parse the
 test_grammar.py files from both Python 2 and Python 3.
 """
 
-from __future__ import with_statement
-
 # Testing imports
 from . import support
 from .support import driver

Lib/lib2to3/tests/test_pytree.py

@@ -9,8 +9,6 @@ more helpful than printing of (the first line of) the docstring,
 especially when debugging a test.
 """
 
-from __future__ import with_statement
-
 # Testing imports
 from . import support
 

Lib/lib2to3/tests/test_refactor.py

@@ -2,8 +2,6 @@
 Unit tests for refactor.py.
 """
 
-from __future__ import with_statement
-
 import sys
 import os
 import codecs

Tools/gdb/libpython.py

@@ -44,7 +44,7 @@ The module also extends gdb with some python-specific commands.
 # NOTE: some gdbs are linked with Python 3, so this file should be dual-syntax
 # compatible (2.6+ and 3.0+).  See #19308.
 
-from __future__ import print_function, with_statement
+from __future__ import print_function
 import gdb
 import os
 import locale

Tools/hg/hgtouch.py

@@ -7,7 +7,6 @@ syntax of make rules.
 
 In addition to the dependency syntax, #-comments are supported.
 """
-from __future__ import with_statement
 import errno
 import os
 import time

Tools/pybench/With.py

-from __future__ import with_statement
 from pybench import Test
 
 class WithFinally(Test):

Tools/scripts/generate_opcode_h.py

 # This script generates the opcode.h header file.
 
-from __future__ import with_statement
-
 import sys
 header = """/* Auto-generated by Tools/scripts/generate_opcode_h.py */
 #ifndef Py_OPCODE_H