fix(.travis.yml): disable broken parts
fix(.travis.yml): disable broken parts

leanprover-community/lean,dselsam/lean,digama0/lean,dselsam/lean,fgdorais/lean,avigad/lean,leanprover-community/lean,rlewis1988/lean,rlewis1988/lean,leodemoura/lean,fgdorais/lean,leodemoura/lean,fpvandoorn/lean,digama0/lean,leodemoura/lean,johoelzl/lean,rlewis1988/lean,leodemoura/lean,leanprover/lean,leanprover/lean,Kha/lean,johoelzl/lean,leanprover-community/lean,avigad/lean,Kha/lean,dselsam/lean,leanprover-community/lean,rlewis1988/lean,leanprover-community/lean,leanprover/lean,dselsam/lean,johoelzl/lean,fgdorais/lean,avigad/lean,johoelzl/lean,leanprover-community/lean,fgdorais/lean,dselsam/lean,dselsam/lean,fpvandoorn/lean,digama0/lean,leodemoura/lean,avigad/lean,johoelzl/lean,rlewis1988/lean,fpvandoorn/lean,leanprover/lean,fpvandoorn/lean,digama0/lean,leanprover/lean,Kha/lean,avigad/lean,Kha/lean,fpvandoorn/lean,johoelzl/lean,leodemoura/lean,digama0/lean,Kha/lean,fgdorais/lean,avigad/lean,digama0/lean,rlewis1988/lean,fpvandoorn/lean,Kha/lean,leanprover/lean,fgdorais/lean