declone and close the door (#12035)

* declone and close the door

* cargo fmt

* remove brackets

substrate/frame/staking/src/mock.rs

@@ -826,7 +826,7 @@ pub(crate) fn on_offence_now(
 pub(crate) fn add_slash(who: &AccountId) {
 	on_offence_now(
 		&[OffenceDetails {
-			offender: (who.clone(), Staking::eras_stakers(active_era(), who.clone())),
+			offender: (*who, Staking::eras_stakers(active_era(), *who)),
 			reporters: vec![],
 		}],
 		&[Perbill::from_percent(10)],

substrate/frame/staking/src/tests.rs

@@ -1082,10 +1082,7 @@ fn validator_payment_prefs_work() {
 	// This test will focus on validator payment.
 	ExtBuilder::default().build_and_execute(|| {
 		let commission = Perbill::from_percent(40);
-		<Validators<Test>>::insert(
-			&11,
-			ValidatorPrefs { commission: commission.clone(), ..Default::default() },
-		);
+		<Validators<Test>>::insert(&11, ValidatorPrefs { commission, ..Default::default() });
 
 		// Reward controller so staked ratio doesn't change.
 		<Payee<Test>>::insert(&11, RewardDestination::Controller);