clean up unused imports and bad whitespace

1 files changed, 1 insertions, 1 deletions

diff --git a/numpy/core/defmatrix.py b/numpy/core/defmatrix.py
index e64fd8c6d..58460265a 100644
--- a/numpy/core/defmatrix.py
+++ b/numpy/core/defmatrix.py
@@ -2,7 +2,6 @@ __all__ = ['matrix', 'bmat', 'mat', 'asmatrix']
 
 import numeric as N
 from numeric import concatenate, isscalar, binary_repr
-import types
 import string as str_
 import sys
 
@@ -238,6 +237,7 @@ class matrix(N.ndarray):
         over all dimensions.  This preserves the orientation of the
         result as a row or column.
         """
+        # FIXME: should out=None be used here, or should it just be out?
         return N.ndarray.sum(self, axis, dtype, out=None)._align(axis)
 
     def mean(self, axis=None, out=None):