message: Remove the reference to `ChecksummedHexForm`
diff: @@ -50,11 +50,7 @@ pub enum Error {
  #[derive(Copy, Clone, DataSize, Ord, PartialOrd, Eq, PartialEq, Hash, Default, JsonSchema)]
  #[serde(deny_unknown_fields)]
  #[schemars(with = "String", description = "Checksummed hex-encoded hash digest.")]
  -pub struct Digest(
  - #[serde(with = "ChecksummedHexForm::<[u8; Digest::LENGTH]>")]
  - #[schemars(skip, with = "String")]
  - pub(crate) [u8; Digest::LENGTH],
  -);
  +pub struct Digest(#[schemars(skip, with = "String")] pub(crate) [u8; Digest::LENGTH]);
  impl Digest {
  /// The number of bytes in a `Digest`.
  