chore(kernel): remove dead file
chore(kernel): remove dead file

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

Kha/lean,soonhokong/lean-windows,eigengrau/lean,eigengrau/lean,soonhokong/lean,rlewis1988/lean,fpvandoorn/lean,leanprover-community/lean,avigad/lean,levnach/lean,Kha/lean,leanprover/lean,javra/lean,soonhokong/lean-osx,fgdorais/lean,fgdorais/lean,digama0/lean,johoelzl/lean,UlrikBuchholtz/lean,fpvandoorn/lean,digama0/lean,levnach/lean,leanprover/lean,soonhokong/lean-osx,dselsam/lean,soonhokong/lean-osx,htzh/lean,soonhokong/lean,codyroux/lean0.1,levnach/lean,UlrikBuchholtz/lean,leanprover/lean,soonhokong/lean-osx,soonhokong/lean-windows,fpvandoorn/lean,fpvandoorn/lean,codyroux/lean0.1,soonhokong/travis_test,javra/lean,dselsam/lean,leodemoura/lean,codyroux/lean0.1,dselsam/lean,fgdorais/lean,soonhokong/travis_test,fpvandoorn/lean2,soonhokong/lean,leanprover/lean,johoelzl/lean,levnach/lean,htzh/lean,sp3ctum/lean,sp3ctum/lean,soonhokong/lean,c-cube/lean,leodemoura/lean,rlewis1988/lean,avigad/lean,Kha/lean,rlewis1988/lean,c-cube/lean,fpvandoorn/lean2,fpvandoorn/lean,johoelzl/lean,leodemoura/lean,htzh/lean,fgdorais/lean,dselsam/lean,UlrikBuchholtz/lean,johoelzl/lean,leodemoura/lean,Kha/lean,leodemoura/lean,soonhokong/lean-windows,eigengrau/lean,javra/lean,digama0/lean,javra/lean,soonhokong/lean-osx,soonhokong/travis_test,leanprover/lean,Kha/lean,soonhokong/travis_test,leanprover-community/lean,dselsam/lean,htzh/lean,UlrikBuchholtz/lean,fpvandoorn/lean,sp3ctum/lean,fpvandoorn/lean2,digama0/lean,c-cube/lean,UlrikBuchholtz/lean,fpvandoorn/lean2,soonhokong/lean-windows,johoelzl/lean,leanprover/lean,soonhokong/lean,avigad/lean,sp3ctum/lean,leanprover-community/lean,htzh/lean,avigad/lean,rlewis1988/lean,leanprover-community/lean,dselsam/lean,avigad/lean,sp3ctum/lean,codyroux/lean0.1,eigengrau/lean,digama0/lean,fgdorais/lean,fpvandoorn/lean2,c-cube/lean,Kha/lean,digama0/lean,leanprover-community/lean,rlewis1988/lean,leodemoura/lean,johoelzl/lean,soonhokong/lean-windows,levnach/lean,c-cube/lean,leanprover-community/lean,fgdorais/lean,javra/lean,rlewis1988/lean,eigengrau/lean,avigad/lean