[PRQ#58963] Deletion Request for hdf5_18-mpich

[notify]

MarsSeed [1] filed a deletion request for hdf5_18-mpich [2]:

Fails to build from source.
Nothing on AUR needs this legacy variant anymore.

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/hdf5_18-mpich/