remove python-future dependency

This commit removes the dependency on the __future__ module, which was
used to enable Python 3 features in Python 2 code. With support for
Python 2 being dropped, it is no longer necessary to maintain backward
compatibility.

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

lib/py/cli.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-from __future__ import print_function
 import argparse
 import sys
 import json