Redundant files

[jhmatthews]

When looking at what github tracks I noticed the following files which are not used in the makefile anywhere but are tracked by the repository

constants.c
get_atomicdata_new.c
get_atomicdata_partial.c
goo.c
hub.c
ionization_old.c
kurucz.c
rand_func.c
sim.c
test_diectronic.c

Can these be removed and no longer tracked by github? If so I will do so and close. If anyone requires looking at them they can do so by looking at an older version of a release, and download the files if they so require.

[kslong]

I think it is reasonable to clean these from the distribution. We can recover if need be.