Depricated attribute on re-exports doesn't actually do anything

[AloeareV]

This line doesn't actually do anything.

librustzcash/zcash_primitives/src/zip32.rs

Line 12 in 47596b0

#[deprecated(note = "Please use the types exported from the `zip32::sapling` module instead.")]

If this warning worked as intended, it would have been really helpful. As it is, is there some other way to notify consumers about the move? Has it been long enough that the pub use can be removed in the next version?