refactor: remove unused import

- Remove unused import statement for 'shared.dart' in create_headline_bloc.dart

Author: fulleni

lib/content_management/bloc/create_headline/create_headline_bloc.dart

@@ -3,7 +3,6 @@ import 'package:core/core.dart';
 import 'package:data_repository/data_repository.dart';
 import 'package:equatable/equatable.dart';
 import 'package:flutter/foundation.dart';
-import 'package:flutter_news_app_web_dashboard_full_source_code/shared/shared.dart';
 import 'package:uuid/uuid.dart';
 
 part 'create_headline_event.dart';