fileinput: replace this last occurence of codecs.open with builtins.open.
diff --git a/Lib/fileinput.py b/Lib/fileinput.py
index 554beb2..dbbbb21 100644
--- a/Lib/fileinput.py
+++ b/Lib/fileinput.py
@@ -398,9 +398,8 @@
 
 
 def hook_encoded(encoding):
-    import codecs
     def openhook(filename, mode):
-        return codecs.open(filename, mode, encoding)
+        return open(filename, mode, encoding=encoding)
     return openhook