message: Remove error message when serializing TX message with number of inputs and witnesses unequal
diff: @@ -25,8 +25,6 @@ impl<Extra: property::Serialize> property::Serialize for AuthenticatedTransactio
  type Error = Extra::Error;
  fn serialize<W: std::io::Write>(&self, mut writer: W) -> Result<(), Extra::Error> {
  - assert_eq!(self.transaction.inputs.len(), self.witnesses.len());
  -
  // encode the transaction body
  self.transaction.serialize(&mut writer)?;
  