Sphinx will try to skip any members coming in through an import, but if

they're listed in __all__, it's assumed they should be documented. We

don't want this for any modules that are providing compatibility

imports, as it's just confusing.
Our excluder extension now looks for a __deprecated__ member of the

module, and will exclude anything found in that list. This makes it easy

for us to choose what in a module we want to exclude and what we don't.

Used this to exclude some modules I'm deprecating.