删除dns，弹窗广告广告位调整

lib/hj_utils/dns_solve/_question.dart

@@ -1,22 +0,0 @@
-part of '_dnsolve.dart';
-
-class _Question {
-  const _Question({required this.name, required this.rType});
-
-  final String? name;
-  final RecordType? rType;
-
-  factory _Question.fromJson(Map<String, dynamic>? json) {
-    if (json == null) {
-      return const _Question(name: null, rType: null);
-    }
-
-    return _Question(
-      name: json['name'] as String,
-      rType: DNSolve.intToRecord(json['type'] as int),
-    );
-  }
-
-  @override
-  String toString() => '''(name: $name, rType: $rType)''';
-}