applgrid/apfelgrid: package seems umaintained

[Mic92]

Nixpkgs version

• Unstable (25.05)

Describe the bug

applgrid in nixpkgs currently stuck on a version from 2015 and apfelgrid is stuck on a version from 2016.
Both depend on a rather big dependencies called root, which we have to also build in version 5 just for these packages.
Are those packages still maintained and used by you? @veprbl

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[veprbl]

I was using xfitter until a while ago. I think it can be compiled without an "outdated" version applgrid/root. Regarding, APFELgrid, I used that package once or twice for table conversions for nnpdf. Other user for apfelgrid might be @Radonirinaunimi (judging by NNPDF/pinefarm#92 (comment)).

In any case, none of the context matters if packages are a burden to the Nixpkgs community. @Mic92, I'm happy to remove root5 itself if you need to be gone.