Clean out remaining old goa references (e.g. rna, complex) now that we've switched to goa "plus" files

[kltm]

This is a follow-on from https://github.com/geneontology/go-site/issues/2214

Basically, in the main pipeline and in the NEO build, there are still from traces of the old metadata. While I don't think it's actually causing any data changes for the moment, I think it would be good to remove any remaining traces, as it is making debugging (possibly related) issues difficult.