message: fixup! clippy fix
  Closes:
  Approved by: phoenix-antigravity
diff: @@ -53,7 +53,7 @@ impl LibraDBTrait for MockLibraDB {
  .all_txns
  .iter()
  .find(|x| {
  - if let Some(t) = x.as_signed_user_txn().ok() {
  + if let Ok(t) = x.as_signed_user_txn() {
  t.sender() == address && t.sequence_number() == seq_num
  } else {
  false
  @@ -92,7 +92,7 @@ impl LibraDBTrait for MockLibraDB {
  .iter()
  .skip(start_version as usize)
  .take(limit as usize)
  - .map(|x| x.clone())
  + .cloned()
  .collect();
  let first_transaction_version = transactions.first().map(|_| start_version);
  Ok(TransactionListWithProof {
  