Remove some unused osFunctions that were left in the LSL function
file from the separation way back when. Inline the osSetParcelMediaURL
code to get rid of the osFunction. Really need to add a way for one API
to call another.
"First stage in a major Script Engine refactor, that will result in the LSL implementaions ebing reconverged. Not there yet, but one major part is done."
Thank you, Melanie!