cleanup(transport_helper): reorder some lines in departures + rm sht

and remove some unnecessary try-catch

lib/transport_helper.dart

@@ -823,31 +823,25 @@ class Departure {
       departureTime: map["departuretime"] as DateTime,
     );
   }
+
   factory Departure.fromJson(Map<String, dynamic> json) {
     Vehicle vehicle = Vehicle.fromJson(json["Product"][0]);
-    // try {
     vehicle.dbInsert();
-    // } catch (e) {
-    //   vehicle.dbUpdate();
-    // }
     Station station = Station(
       id: json["stopid"],
       name: json["stop"],
       transportLines: [],
     );
-    // try {
     station.dbInsert();
-    // } catch (e) {
-    //   station.dbUpdate();
-    // }
+
     DateTime? arrDateTime;
-    DateTime? depDateTime;
     String? arrivalDate = json["arrDate"];
     String? arrivalTime = json["arrTime"];
     if (arrivalDate != null && arrivalTime != null) {
       arrDateTime = DateTime.parse('${arrivalDate}T$arrivalTime');
     }
 
+    DateTime? depDateTime;
     String? departureDate = json["depDate"] ?? json["date"];
     String? departureTime = json["depTime"] ?? json["time"];
     if (departureDate != null && departureTime != null) {
@@ -985,4 +979,4 @@ enum VehicleType {
   subway,
   regionalTrain,
   PLACEHOLDER,
-}
+}