py: Remove unneeded future imports.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>

py/make_root_pointers.py

@@ -6,8 +6,6 @@ These are used to generate a header with the required entries for
 "struct _mp_state_vm_t" in py/mpstate.h
 """
 
-from __future__ import print_function
-
 import argparse
 import io
 import re

py/makecompresseddata.py

@@ -1,5 +1,3 @@
-from __future__ import print_function
-
 import collections
 import re
 import sys

py/makemoduledefs.py

@@ -14,8 +14,6 @@ py/builtinimnport.c:process_import_at_level. Regular modules will always use
 the built-in version.
 """
 
-from __future__ import print_function
-
 import sys
 import re
 import io

py/makeqstrdata.py

@@ -4,8 +4,6 @@ Process raw qstr file and output qstr data with length, hash and data bytes.
 This script works with Python 3.3+.
 """
 
-from __future__ import print_function
-
 import re
 import sys
 

py/makeqstrdefs.py

@@ -5,8 +5,6 @@ qstr. Each qstr is transformed into a qstr definition of the form 'Q(...)'.
 This script works with Python 3.3+.
 """
 
-from __future__ import print_function
-
 import io
 import os
 import re

py/makeversionhdr.py

@@ -4,8 +4,6 @@ Generate header file with macros defining MicroPython version info.
 This script works with Python 3.3+.
 """
 
-from __future__ import print_function
-
 import argparse
 import sys
 import os