

do_output_files_exist() was still checking for the existence of certain files
that I no longer generate (see yesterday's commit).  This is not a correctness
problem, but since the codebase checks to see if it can skip steps if the
corresponding output already exists, this was slowing things down.

RS1999ent/spectroscope,RS1999ent/spectroscope,RS1999ent/spectroscope