Remove stray print

tests/test_serializer.py

@@ -110,6 +110,5 @@ class TestSerializer(Base):
     def test_iter(self):
         sp = nilmdb.utils.serializer_proxy
         i = sp(ListLike)()
-        print iter(i)
         eq_(list(i), [1,2,3,4,5])
         eq_(i[3], 3)