fix(CMakeLists): remove executable before overwriting on windows, second try
fix(CMakeLists): remove executable before overwriting on windows, second try

@digama0 Does this fix the problem for you?

leanprover/lean,Kha/lean,leanprover-community/lean,dselsam/lean,avigad/lean,digama0/lean,leanprover-community/lean,leanprover/lean,digama0/lean,leodemoura/lean,leanprover-community/lean,digama0/lean,johoelzl/lean,avigad/lean,johoelzl/lean,Kha/lean,Kha/lean,fpvandoorn/lean,leanprover/lean,leodemoura/lean,johoelzl/lean,leanprover/lean,avigad/lean,leanprover-community/lean,fpvandoorn/lean,Kha/lean,leanprover/lean,digama0/lean,dselsam/lean,leodemoura/lean,digama0/lean,fpvandoorn/lean,leodemoura/lean,johoelzl/lean,dselsam/lean,digama0/lean,leodemoura/lean,avigad/lean,leanprover/lean,dselsam/lean,Kha/lean,fpvandoorn/lean,dselsam/lean,johoelzl/lean,johoelzl/lean,leodemoura/lean,avigad/lean,fpvandoorn/lean,fpvandoorn/lean,Kha/lean,dselsam/lean,avigad/lean,leanprover-community/lean,leanprover-community/lean