Those additional languages does not seem to really have much usage
(e.g.: none in nixpkgs). For example, Ruby is pretty much broken for all
environments for quite sometime already, however nobody seemed to border
enough to fix it. They also add a good amount of size to the derivation.
So let's remove them. It should be really easy if someone still cares
for them and want to add them back on their own system: just use the
`mkGraal` function (that we export) to generate their own version of
GraalVM with all extra features they want.
