lib flag is no longer required for cabal-install
lib flag is no longer required for cabal-install

It was required for Cabal-2.2 but as we have Cabal-2.4 for quite some time it makes sense to remove this flag and e.g. current Stack master complains seeing it
simonmichael/stackage,stackbuilders/stackage,jonschoning/stackage,mrkkrp/stackage,Daniel-Diaz/stackage,mstksg/stackage,michalkonecny/stackage,asr/stackage,soenkehahn/stackage,clinty/stackage,peti/stackage,wereHamster/stackage,ethercrow/stackage,athanclark/stackage,int-index/stackage,fimad/stackage,iand675/stackage,fpco/stackage,spencerjanssen/stackage,massysett/stackage