message: Fix clippy :t-rex:
diff: @@ -311,9 +311,9 @@ mod tests {
  fn insert_and_take_work() {
  ink_env::test::run_test::<ink_env::DefaultEnvironment, _>(|_| {
  let mut mapping: Mapping<u8, _> = Mapping::new();
  - mapping.insert(&1, &2);
  - assert_eq!(mapping.take(&1), Some(2));
  - assert!(mapping.get(&1).is_none());
  + mapping.insert(1, &2);
  + assert_eq!(mapping.take(1), Some(2));
  + assert!(mapping.get(1).is_none());
  Ok(())
  })
  @@ -324,7 +324,7 @@ mod tests {
  fn take_empty_value_work() {
  ink_env::test::run_test::<ink_env::DefaultEnvironment, _>(|_| {
  let mapping: Mapping<u8, u8> = Mapping::new();
  - assert_eq!(mapping.take(&1), None);
  + assert_eq!(mapping.take(1), None);
  Ok(())
  })
  