Code clean up

theano/compile/profiling.py

@@ -816,16 +816,10 @@ class ProfileStats(object):
                         continue
 
                     view_of_temp = view_of.copy()
-                    # We don't want a shallow copy, but we don't want
-                    # a deep copy. So this do a "middle" copy, where
-                    # we copy the dict and the list, but not the var
-                    # viewed_by_temp = {}
-                    # for k, v in viewed_by.iteritems():
-                    #     viewed_by_temp[k] = list(v)
 
                     change_track_add = defaultdict(lambda: [])
                     change_track_remove = defaultdict(lambda: [])
-                    # use to track viewed_by changes
+                    # Use to track viewed_by changes
 
                     for var in node.outputs:
                         compute_map[var][0] = 1