Don't let TC39 add smoosh and smooshMap to JavaScript

Context: https://github.com/tc39/proposal-flatMap/pull/56

This entire thing is just dumb. I would actually double down and _let_ them name it smoosh because they will surely make some non-FP friendly design choice in semantics anyways.

This is a bit bizarre; but perhaps less bizarre than making the language spec specify the thing be named "smooshMap". (!)