message: Remove unnecessary unwrap used in Interval codes
diff: @@ -216,11 +216,10 @@ impl Interval {
  match (nums.get(0), nums.get(1)) {
  (Some(days), Some(time)) => {
  let days = parse_integer(days)?;
  - let time = NaiveTime::from_str(&format!("{}:00", time)).unwrap();
  - let minutes = time.hour() * 60 + time.minute();
  + let time = format!("{}:00", time);
  Interval::days(days)
  - .add(&Interval::minutes(minutes as i32))
  + .add(&parse_time(&time)?)
  .map(|interval| sign() * interval)
  }
  _ => Err(IntervalError::FailedToParseDayToMinute(value.to_owned()).into()),
  