removed unused code and files

lib/storage/base/settings.dart

@@ -4,7 +4,6 @@ import 'package:json_annotation/json_annotation.dart';
 import '../devTools/devToolsSettings.dart';
 import '../file/fileSettings.dart';
 import '../fileView/fileViewSettings.dart';
-import '../gradeAverages/gradeAveragesSettings.dart';
 import '../holidays/holidaysSettings.dart';
 import '../notification/notificationSettings.dart';
 import '../talk/talkSettings.dart';
@@ -21,7 +20,6 @@ class Settings {
   ThemeMode appTheme;
   bool devToolsEnabled;
 
-  GradeAveragesSettings gradeAveragesSettings;
   TimetableSettings timetableSettings;
   TalkSettings talkSettings;
   FileSettings fileSettings;
@@ -33,7 +31,6 @@ class Settings {
   Settings({
     required this.appTheme,
     required this.devToolsEnabled,
-    required this.gradeAveragesSettings,
     required this.timetableSettings,
     required this.talkSettings,
     required this.fileSettings,

lib/storage/base/settings.g.dart

@@ -9,8 +9,6 @@ part of 'settings.dart';
 Settings _$SettingsFromJson(Map<String, dynamic> json) => Settings(
       appTheme: Settings._themeFromJson(json['appTheme'] as String),
       devToolsEnabled: json['devToolsEnabled'] as bool,
-      gradeAveragesSettings: GradeAveragesSettings.fromJson(
-          json['gradeAveragesSettings'] as Map<String, dynamic>),
       timetableSettings: TimetableSettings.fromJson(
           json['timetableSettings'] as Map<String, dynamic>),
       talkSettings:
@@ -30,7 +28,6 @@ Settings _$SettingsFromJson(Map<String, dynamic> json) => Settings(
 Map<String, dynamic> _$SettingsToJson(Settings instance) => <String, dynamic>{
       'appTheme': Settings._themeToJson(instance.appTheme),
       'devToolsEnabled': instance.devToolsEnabled,
-      'gradeAveragesSettings': instance.gradeAveragesSettings.toJson(),
       'timetableSettings': instance.timetableSettings.toJson(),
       'talkSettings': instance.talkSettings.toJson(),
       'fileSettings': instance.fileSettings.toJson(),