[DF] Simplify GetVariedFilter
[DF] Simplify GetVariedFilter

Program logic guarantees we never call it for the "nominal" case.

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