chore(frontends/lean/inductive_cmds): remove copy&paste code
chore(frontends/lean/inductive_cmds): remove copy&paste code

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