message: zcash_primitives: Remove redundant TODO
  The primitives are no longer generic over a curve; we hard-code Jubjub,
  so we know that the smallest u-coordinate that is not on the curve is 1.
diff: @@ -223,9 +223,6 @@ impl Note {
  pub fn uncommitted() -> bls12_381::Scalar {
  // The smallest u-coordinate that is not on the curve
  // is one.
  - // TODO: This should be relocated to JubjubEngine as
  - // it's specific to the curve we're using, not all
  - // twisted edwards curves.
  bls12_381::Scalar::one()
  }
  