Don't log bloc changes for now

lib/app_bloc_observer.dart

@@ -13,7 +13,7 @@ class AppBlocObserver extends BlocObserver {
   @override
   void onChange(BlocBase<dynamic> bloc, Change<dynamic> change) {
     super.onChange(bloc, change);
-    logger('============= ${bloc.runtimeType} $change =============');
+    // logger('============= ${bloc.runtimeType} $change =============');
   }
 
   @override