* Removed old Nix descriptors.

test/tmpl/aterm-2.0.nix

test/tmpl/atk-1.2.0.nix

test/tmpl/glib-2.2.1.nix

test/tmpl/gnet-1.1.8.nix

test/tmpl/gtk+-2.2.1.nix

test/tmpl/gtkspell-2.0.2.nix

test/tmpl/pan-0.13.4.nix

test/tmpl/pan-0.13.91-run.nix

test/tmpl/pan-0.13.91.nix

test/tmpl/pan-0.13.93.nix

test/tmpl/pango-1.2.1.nix

test/tmpl/pkgconfig-0.15.0.nix

test/tmpl/pspell-.12.2.nix

test/tmpl/subversion-0.20.1.nix