Delete useless keywords

Author: Maria-Bordunova

example/lib/home.dart

@@ -94,7 +94,7 @@ class _HomeViewState extends State<HomeView> {
 
   Future<void> _initPlatformState() async {
     if (kDebugMode) {
-      await Qonversion.setDebugMode();
+      Qonversion.setDebugMode();
     }
 
     Qonversion.launch(

example/lib/params_view.dart

@@ -21,7 +21,7 @@ class ParamsView extends StatelessWidget {
               child: Text('Set User ID'),
               color: Colors.green,
               textColor: Colors.white,
-              onPressed: () async {
+              onPressed: () {
                 Qonversion.setUserId('customId');
                 print('did set user id');
               },