remove haskell-stack Dockerfile
remove haskell-stack Dockerfile

phadej/stack,meiersi-11ce/stack,rvion/stack,tedkornish/stack,rubik/stack,AndrewRademacher/stack,supermario/stack,narrative/stack,tedkornish/stack,keent/stack,mathhun/stack,kairuku/stack,rrnewton/stack,Heather/stack,Fuuzetsu/stack,sjakobi/stack,cabrera/stack,harendra-kumar/stack,Blaisorblade/stack,deech/stack,achernyak/stack,deech/stack,narrative/stack,kairuku/stack,robstewart57/stack,supermario/stack,sjakobi/stack,fizruk/stack,achernyak/stack,lukexi/stack,mrkkrp/stack,Fuuzetsu/stack,anton-dessiatov/stack,MichielDerhaeg/stack,AndreasPK/stack,anton-dessiatov/stack,vigoo/stack,cabrera/stack,sinelaw/stack,AndrewRademacher/stack,adinapoli/stack,juhp/stack,Andrew-the-Ubergeek/stack,luigy/stack,MichielDerhaeg/stack,fizruk/stack,rvion/stack,phadej/stack,lukexi/stack,adinapoli/stack,mrkkrp/stack,Blaisorblade/stack,Heather/stack,vigoo/stack,keent/stack,meiersi-11ce/stack,harendra-kumar/stack,AndreasPK/stack,martin-kolinek/stack,Andrew-the-Ubergeek/stack,juhp/stack,rrnewton/stack,martin-kolinek/stack,robstewart57/stack,sinelaw/stack,rubik/stack,luigy/stack,mathhun/stack