Remove unecessary activeVehicle tracking

* This was causing main window to close when activeVehicle went away
* They are not needed since there are already correct activeVehicle checks which cause map items to hide

Author: DonLakeFlyer

src/FlightDisplay/FlyViewMap.qml

@@ -388,15 +388,6 @@ FlightMap {
             globals.guidedControllerFlyView.fwdFlightGotoMapCircle = this
         }
 
-        Connections {
-            target: QGroundControl.multiVehicleManager
-            function onActiveVehicleChanged(activeVehicle) {
-                if (!activeVehicle) {
-                    visible = false
-                }
-            }
-        }
-
         Binding {
             target: _fwdFlightGotoMapCircle
             property: "center"
@@ -472,15 +463,6 @@ FlightMap {
             }
         }
 
-        Connections {
-            target: QGroundControl.multiVehicleManager
-            function onActiveVehicleChanged(activeVehicle) {
-                if (!activeVehicle) {
-                    hide()
-                }
-            }
-        }
-
         function show(coord) {
             gotoLocationItem.coordinate = coord
             gotoLocationItem.visible = true