[DF][NFC] Remove now unused helper functions
[DF][NFC] Remove now unused helper functions

...not exposed by headers

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