diff --git a/zipline/gens/vwap.py b/zipline/gens/vwap.py
index b2e72dfd..e904d0e0 100644
--- a/zipline/gens/vwap.py
+++ b/zipline/gens/vwap.py
@@ -1,8 +1,6 @@
 from numbers import Number
-from datetime import datetime, timedelta
 from collections import defaultdict
 
-from zipline import ndict
 from zipline.gens.transform import EventWindow, TransformMeta
 
 class VWAP(object):