clean unused forward declaration

src/app/livedatamanager.h

@@ -17,10 +17,6 @@
 
 #include <vector>
 
-namespace KItinerary {
-class TrainTrip;
-}
-
 namespace KPublicTransport {
 class JourneyReply;
 class JourneySection;

src/app/reservationhelper.h

@@ -9,7 +9,6 @@
 
 #include <utility>
 
-class QDateTime;
 class QString;
 class QVariant;
 

src/app/reservationmanager.h

@@ -13,7 +13,6 @@
 #include <QObject>
 #include <QVariant>
 
-class QUrl;
 
 /** Manages JSON-LD reservation data.
  *  This is done on two levels:

src/app/timelinemodel.h

@@ -19,10 +19,6 @@ class WeatherForecastManager;
 class TripGroupManager;
 class TransferManager;
 
-namespace KItinerary {
-class GeoCoordinates;
-}
-
 class TimelineModel : public QAbstractListModel
 {
     Q_OBJECT

src/app/tripgroupmanager.h

@@ -12,7 +12,6 @@
 
 class ReservationManager;
 class TripGroup;
-class TripGroupTest;
 
 /** Trip group computation and persistence.
  *  This operates on multi-traveler batches as provided by ReservationManager.