TF-1963 Use viewState to update result from interactor

(cherry picked from commit 335536fb94b32d978082578048ec06f70d21edcb)

core/lib/core.dart

@@ -101,7 +101,6 @@ export 'data/network/download/downloaded_response.dart';
 // State
 export 'presentation/state/success.dart';
 export 'presentation/state/failure.dart';
-export 'presentation/state/app_state.dart';
 
 // Model
 export 'data/model/source_type/data_source_type.dart';

core/lib/presentation/state/app_state.dart

@@ -1,15 +0,0 @@
-import 'package:core/presentation/state/failure.dart';
-import 'package:core/presentation/state/success.dart';
-import 'package:dartz/dartz.dart';
-import 'package:equatable/equatable.dart';
-import 'package:flutter/material.dart';
-
-@immutable
-abstract class AppState with EquatableMixin {
-  final Either<Failure, Success> viewState;
-
-  AppState(this.viewState);
-
-  @override
-  List<Object?> get props => [viewState];
-}