diff --git a/zipline/transforms/utils.py b/zipline/transforms/utils.py
index 3ab4ceab..b705c15e 100644
--- a/zipline/transforms/utils.py
+++ b/zipline/transforms/utils.py
@@ -55,10 +55,6 @@ class InvalidWindowLength(Exception):
     pass
 
 
-class TransformMessage(object):
-    pass
-
-
 class Passthrough(object):
     PASSTHROUGH = True
     """