[PRQ#49235] Deletion Request for ghc7.8

MarsSeed [1] filed a deletion request for ghc7.8 [2]: Unneeded legacy ghc version from January 2014, with python2 based check(). Nothing depends on it. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ghc7.8/