Remove a lot of sys.version_info references

test/refactor.py

@@ -8,7 +8,6 @@ from __future__ import with_statement
 import os
 import platform
 import re
-import sys
 
 from parso import split_lines
 
@@ -90,8 +89,6 @@ def _collect_file_tests(code, path, lines_to_execute):
 
 
 def collect_dir_tests(base_dir, test_files):
-    if sys.version_info[0] == 2:
-        return
     for f_name in os.listdir(base_dir):
         files_to_execute = [a for a in test_files.items() if a[0] in f_name]
         lines_to_execute = reduce(lambda x, y: x + y[1], files_to_execute, [])