added map tab in view cams

lib/addCam/cam_widgets.dart

@@ -140,11 +140,6 @@ class _VarTextFieldState extends State<VarTextField> {
       ],
     );
   }
-
-  DropdownMenuItem<String> buildMenuItem(String item) => DropdownMenuItem(
-        value: item,
-        child: Text(item),
-      );
 }
 
 // Karte
@@ -166,9 +161,7 @@ class Karte extends StatefulWidget {
 }
 
 class KarteState extends State<Karte> {
-  List<Marker> markers = [
-    const Marker(point: LatLng(0, 0), child: Icon(Icons.location_on))
-  ];
+  List<Marker> markers = [ ];
   LatLng? selectedPosition;
   Position? updatedPosition;
   bool saveVisible = false;