If* salting newborns is a good thing, why don't we do it anymore?
This is not a "Why don't we follow the Sages' medical advice?" question. If, in fact, Ezekiel 16:4 is emphasizing how neglected we were when G-d took care of us, it would seem, at the very least, that a prophet of G-d deems it an important practice and a basic part of post-childbirth care, like cutting the umbilical cord and cleansing and swaddling the newborn.
Is there any Halachic literature encouraging (or mandating) the practice? Incidentally, is there any Halachic literature at all about what to do immediately postpartum?
*Big "IF". The thought there, though it resonates with me on an interpretive level, might be way off.