Re: ``Table.take`` should be ``Table.pop`` -- discuss

[cblake]

An un-keyed `pop(Table): tuple[K,V]` more similar to `HashSet.pop` is mentioned 
in the PR commentary linked above. (I would personally just use the 
already-defined iterator than b3liever's inline expansion, but eh. Either way.) 
Totally suitable for another PR. I just wanted to keep the above one more 
focused.