Fehlerkorrekturen

lib/content_views/approach_area_page.dart

@@ -1,4 +1,3 @@
-import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:isar/isar.dart';
@@ -12,7 +11,6 @@ import 'package:stadtbote/tools/constants.dart';
 import 'package:stadtbote/tools/message_service.dart';
 import 'package:stadtbote/tools/messages/publish_payload_message.dart';
 import 'package:stadtbote/tools/messages/ranking_updated.dart';
-import 'package:stadtbote/tools/mqtt_core.dart';
 
 import '../tools/util.dart';