[TTreeReader] Do not manipulate TTreeCache with TNtuples
[TTreeReader] Do not manipulate TTreeCache with TNtuples

and modify outdated comments.

olifre/root,root-mirror/root,olifre/root,root-mirror/root,karies/root,karies/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,root-mirror/root,karies/root,olifre/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,karies/root,karies/root,karies/root,karies/root,root-mirror/root,olifre/root