[aur-general] removal request.

[Nico Nell]

Hello,

I maintain several python packages that look like they won't have
python3 support anytime in the near future. I have updated these
package names to reflect only python 2 support.

I would like to have the following packages (that I maintain) removed
as they have no use currently:
python-astlib
python-chiantipy
python-pyds9
python-pysynphot

Thanks,
~Nick