refactor(emacs/lean-flycheck): clean up unused code
refactor(emacs/lean-flycheck): clean up unused code

htzh/lean,htzh/lean,soonhokong/lean-osx,Kha/lean,soonhokong/lean,fpvandoorn/lean,Kha/lean,digama0/lean,leanprover/lean,soonhokong/lean-osx,rlewis1988/lean,leodemoura/lean,leanprover-community/lean,soonhokong/lean,dselsam/lean,javra/lean,fpvandoorn/lean2,leodemoura/lean,UlrikBuchholtz/lean,johoelzl/lean,eigengrau/lean,fpvandoorn/lean2,leanprover/lean,avigad/lean,fgdorais/lean,c-cube/lean,rlewis1988/lean,c-cube/lean,avigad/lean,c-cube/lean,digama0/lean,fpvandoorn/lean,leanprover-community/lean,fpvandoorn/lean2,UlrikBuchholtz/lean,htzh/lean,rlewis1988/lean,leodemoura/lean,UlrikBuchholtz/lean,soonhokong/lean-osx,digama0/lean,soonhokong/lean-windows,soonhokong/lean,digama0/lean,fpvandoorn/lean2,c-cube/lean,soonhokong/lean,sp3ctum/lean,fgdorais/lean,leanprover-community/lean,fpvandoorn/lean,avigad/lean,fpvandoorn/lean,rlewis1988/lean,digama0/lean,sp3ctum/lean,htzh/lean,dselsam/lean,htzh/lean,digama0/lean,levnach/lean,UlrikBuchholtz/lean,rlewis1988/lean,johoelzl/lean,leodemoura/lean,avigad/lean,leodemoura/lean,dselsam/lean,fpvandoorn/lean,eigengrau/lean,javra/lean,Kha/lean,leanprover-community/lean,leanprover/lean,soonhokong/lean,soonhokong/lean-osx,fgdorais/lean,soonhokong/lean-windows,johoelzl/lean,fgdorais/lean,sp3ctum/lean,avigad/lean,javra/lean,javra/lean,johoelzl/lean,levnach/lean,fgdorais/lean,levnach/lean,Kha/lean,levnach/lean,sp3ctum/lean,UlrikBuchholtz/lean,leanprover/lean,sp3ctum/lean,leanprover/lean,eigengrau/lean,c-cube/lean,rlewis1988/lean,soonhokong/lean-windows,Kha/lean,Kha/lean,soonhokong/lean-windows,dselsam/lean,eigengrau/lean,leanprover/lean,fgdorais/lean,leodemoura/lean,soonhokong/lean-windows,soonhokong/lean-osx,avigad/lean,levnach/lean,fpvandoorn/lean,dselsam/lean,fpvandoorn/lean2,leanprover-community/lean,johoelzl/lean,javra/lean,johoelzl/lean,leanprover-community/lean,dselsam/lean,eigengrau/lean