solenv/bin/native-code.py: Use python3

Change-Id: Ie09fc0505266a2a89d0b830294b6af370d5b7b61
Reviewed-on: https://gerrit.libreoffice.org/82582
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

solenv/bin/native-code.py

@@ -1,11 +1,10 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # This file is part of the LibreOffice project.
 #
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-from __future__ import print_function
 from optparse import OptionParser
 
 import re