message: Remove the no longer necessary `unused` attribute
diff: @@ -198,7 +198,6 @@ impl IndexedMerkleProof {
  l
  }
  - #[allow(unused)]
  pub(crate) fn verify(&self) -> Result<(), error::MerkleVerificationError> {
  if !((self.count == 0 && self.index == 0) || self.index < self.count) {
  return Err(error::MerkleVerificationError::IndexOutOfBounds {
  