Obsolete files airy.lisp and ellipt.lisp and specfun vs orthopoly



I just noticed that share/specfunctions contains airy.lisp and
ellipt.lisp.  I think that these are basically obsolete.  There are
new and improved implementations in src now.

Should we delete these?

Also, there is a specfun.mac there and share/orthopoly which have
similar purposes.  Isn't orthopoly the replacement for specfun.mac?
Should we get rid of one?

Ray