Remove deprecated alias `hk.TransformedPair`, now just `hk.Transformed`.
Remove deprecated alias `hk.TransformedPair`, now just `hk.Transformed`.

PiperOrigin-RevId: 295917120
Change-Id: I9889dd3c02ba238c651c09db1098268dc617a9d9

deepmind/dm-haiku,deepmind/dm-haiku