Remove basestring reference, no py2 support

Byron · Byron · commit 2ceedc91958d · 2020-04-11T14:21:10.000+08:00
diff --git a/smmap/util.py b/smmap/util.py
@@ -23,11 +23,7 @@ def buffer(obj, offset, size):
 
 
 def string_types():
-    if sys.version_info[0] >= 3:
-        return str
-    else:
-        return basestring
-
+    return str
 
 def align_to_mmap(num, round_up):
     """
