Remove 'from __future__ import print_function' lines

cibuildwheel/__main__.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import argparse, os, subprocess, sys, textwrap
 
 import cibuildwheel

cibuildwheel/linux.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import os, shlex, subprocess, sys, textwrap, uuid
 from collections import namedtuple
 from .util import prepare_command, get_build_verbosity_extra_flags

cibuildwheel/macos.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import tempfile
 import os, subprocess, shlex, sys, shutil
 from collections import namedtuple

cibuildwheel/windows.py

@@ -1,4 +1,3 @@
-from __future__ import print_function
 import os, tempfile, subprocess, shutil, sys
 from collections import namedtuple
 from glob import glob