py23 import in all nontrivial source files and unused import cleanup
diff --git a/Lib/fontTools/misc/transform.py b/Lib/fontTools/misc/transform.py
index 565aa3c..69cb3fe 100644
--- a/Lib/fontTools/misc/transform.py
+++ b/Lib/fontTools/misc/transform.py
@@ -45,6 +45,7 @@
 	>>>
 """
 
+from .py23 import *
 
 __all__ = ["Transform", "Identity", "Offset", "Scale"]