[DF] Remove wrong RepresentGraph logic
[DF] Remove wrong RepresentGraph logic

If a `RResultPtr<RInterface<RLoopManager, void>>` is passed to
`SaveGraph`, we used to switch to the graph-wide representation.
That's not intended, and it's most likely an oversight.

olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root