perf(library/module_mgr): fix module_info reference cycle
perf(library/module_mgr): fix module_info reference cycle

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