simplified code across the app and consolidated duplicated helpers

lib/state/app/modules/marianum_message/bloc/marianum_message_event.dart

@@ -3,5 +3,3 @@ import 'marianum_message_state.dart';
 
 sealed class MarianumMessageEvent
     extends LoadableHydratedBlocEvent<MarianumMessageState> {}
-
-class MessageEvent extends MarianumMessageEvent {}

lib/state/app/modules/marianum_message/bloc/marianum_message_state.dart

@@ -37,5 +37,3 @@ abstract class MarianumMessage with _$MarianumMessage {
   factory MarianumMessage.fromJson(Map<String, dynamic> json) =>
       _$MarianumMessageFromJson(json);
 }
-
-enum GradeAveragesGradingSystem { highSchool, middleSchool }

lib/state/app/modules/marianum_message/data_provider/marianum_message_get_messages.dart

@@ -12,7 +12,8 @@ import '../bloc/marianum_message_state.dart';
 class MarianumMessageGetMessages {
   final Dio _dio;
 
-  MarianumMessageGetMessages({Dio? dio}) : _dio = dio ?? MarianumConnectApi.dio();
+  MarianumMessageGetMessages({Dio? dio})
+    : _dio = dio ?? MarianumConnectApi.dio();
 
   Future<MarianumMessageList> run() async {
     try {