Maybe you are thinking of egg teeth? Those are not really teeth. It's just an expression.
Naw. I goofed and confused it with the wing claws. I do get a bit daft at times.
You know who else has egg teeth? Some marsupials, who never need to use it since they are born live and never have to break through a shell. Further discussion and references.
This fact makes perfectly good sense from the evolutionary point of view, but is hard to reconcile with any sort of *intelligent* design; why make something that's never used, only to have it disappear later? Some engineer!