Display the arrival time correctly

src/gtfs/structs.rs

@@ -1,6 +1,5 @@
 use std::collections::{HashMap, HashSet};
 
-use chrono::NaiveTime;
 use gtfs_structures::{Agency, Calendar, CalendarDate, RawStopTime, RawTrip, Route, Stop};
 
 // This is to store the preferences for the GTFS(-R) side of the code.
@@ -32,7 +31,7 @@ pub struct Gtfs {
 
 #[derive(Debug)]
 pub struct Arrival<'a> {
-    pub departure_time: i64,
+    pub departure_time: u32,
     pub route: &'a Route,
     pub stop: &'a Stop,
     pub stop_time: &'a RawStopTime,