[4.0] remove Python 2 code parts in generate_user_files.py

Change-Id: I3f74db4dab1bbf03f3929ca9b09971465abdfd1e
---
M generate_user_files.py
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/generate_user_files.py b/generate_user_files.py
index e9657df..701b670 100755
--- a/generate_user_files.py
+++ b/generate_user_files.py
@@ -6,20 +6,16 @@
 #
 # Distributed under the terms of the MIT license.
 #
-from __future__ import absolute_import, division, unicode_literals
-
 import codecs
-from collections import namedtuple
 import os
 import re
 import sys
 
+from collections import namedtuple
 from textwrap import fill
 
 from generate_family_file import _import_with_no_user_config
 
-if sys.version_info[0] == 2:
-    from future_builtins import filter
 
 # DISABLED_SECTIONS cannot be copied; variables must be set manually
 DISABLED_SECTIONS = {'USER INTERFACE SETTINGS',  # uses sys
@@ -135,7 +131,7 @@
     else:
         known_langs = []
 
-    if len(known_langs) == 0:
+    if not known_langs:
         pywikibot.output('There were no known languages found in {}.'
                          .format(fam.name))
         default_lang = None

