Don't strip empty dict entries in HEC code
Don't strip empty dict entries in HEC code

The stripping of empty fields already happens in the returners
themselves. Additionally, doing this recursively was going overboard --
if I have have nested data with None values, I want to know.

If we do need to bring this back eventually, we need to use
copy.deepcopy or similar to avoid side effects. This was hard to track
down.

basepi/hubble,basepi/hubble