Simplify
diff --git a/Lib/fontTools/misc/py23.py b/Lib/fontTools/misc/py23.py
index 8ff9e65..ff33980 100644
--- a/Lib/fontTools/misc/py23.py
+++ b/Lib/fontTools/misc/py23.py
@@ -26,10 +26,7 @@
 try:
 	from StringIO import StringIO
 except ImportError:
-	try:
-		from StringIO import StringIO
-	except ImportError:
-		from io import BytesIO as StringIO
+	from io import BytesIO as StringIO
 
 def strjoin(iterable):
 	return ''.join(iterable)