[PRQ#51215] Deletion Request for mingw-w64-libsearpc

MarsSeed [1] filed a deletion request for mingw-w64-libsearpc [2]: Cleanup of abandoned library after the deletion of its broken consumer from same year, mingw-w64-ccnet (PRQ#51186), whose source repo has been deleted from GitHub. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mingw-w64-libsearpc/