message: Remove some reduntant calls to clone
diff: @@ -317,12 +317,7 @@ fn should_change_one_validator() {
  );
  // check bid overwrite
  - let expected_bid = Bid::unlocked(
  - validator3.clone(),
  - bid_purse,
  - U512::from(104),
  - Default::default(),
  - );
  + let expected_bid = Bid::unlocked(validator3, bid_purse, U512::from(104), Default::default());
  assert_eq!(
  result.get(&Key::Bid(account3)),
  Some(&StoredValue::from(expected_bid))
  @@ -385,12 +380,7 @@ fn should_change_only_stake_of_one_validator() {
  );
  // check bid overwrite
  - let expected_bid = Bid::unlocked(
  - validator3.clone(),
  - bid_purse,
  - U512::from(104),
  - Default::default(),
  - );
  + let expected_bid = Bid::unlocked(validator3, bid_purse, U512::from(104), Default::default());
  assert_eq!(
  result.get(&Key::Bid(account3)),
  Some(&StoredValue::from(expected_bid))
  @@ -503,12 +493,7 @@ fn should_replace_one_validator() {
  // check bid overwrite
  let account1 = validator1.to_account_hash();
  - let mut expected_bid_1 = Bid::unlocked(
  - validator1.clone(),
  - bid_purse,
  - U512::zero(),
  - Default::default(),
  - );
  + let mut expected_bid_1 = Bid::unlocked(validator1, bid_purse, U512::zero(), Default::default());
  expected_bid_1.deactivate();
  assert_eq!(
  result.get(&Key::Bid(account1)),
  