MNT: Remove "test" colortable
MNT: Remove "test" colortable

I'm pretty sure this was accidentally committed awhile back. It does not
appear to be used, and it's not a useful table otherwise.

ShawnMurd/MetPy,ahaberlie/MetPy,dopplershift/MetPy,Unidata/MetPy,ahaberlie/MetPy,Unidata/MetPy,dopplershift/MetPy