[PRQ#46600] Deletion Request for hdf5-mpich

MarsSeed [1] filed a deletion request for hdf5-mpich [2]: Orphan legacy HDF5 version from 2020. Nothing depends on it. Not useful to keep. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/hdf5-mpich/