drop remnants of Python 2 in tests

Author: Changaco

tests/test_entry.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 
-from codecs import open
 import json
 import locale
 from os import environ, stat
@@ -15,8 +14,6 @@
 from . import data_dir, get_entries, get_tarinfos
 
 
-text_type = unicode if str is bytes else str  # noqa: F821
-
 locale.setlocale(locale.LC_ALL, '')
 
 # needed for sane time stamp comparison
@@ -106,7 +103,7 @@ def check_entries(test_file, regen=False, ignore=''):
         # Normalize all unicode (can vary depending on the system)
         for d in (e1, e2):
             for key in d:
-                if isinstance(d[key], text_type):
+                if isinstance(d[key], str):
                     d[key] = unicodedata.normalize('NFC', d[key])
         assert e1 == e2