refactor(library/simplifier): cleanup
refactor(library/simplifier): cleanup

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