clean up models

Signed-off-by: dom <githubaccount56556@proton.me>

lib/models_new/upower_rank/rank_info.dart

@@ -2,28 +2,19 @@ class UpowerRankInfo {
   int? mid;
   String? nickname;
   String? avatar;
-  int? rank;
   int? day;
-  int? expireAt;
-  int? remainDays;
 
   UpowerRankInfo({
     this.mid,
     this.nickname,
     this.avatar,
-    this.rank,
     this.day,
-    this.expireAt,
-    this.remainDays,
   });
 
   factory UpowerRankInfo.fromJson(Map<String, dynamic> json) => UpowerRankInfo(
     mid: json['mid'] as int?,
     nickname: json['nickname'] as String?,
     avatar: json['avatar'] as String?,
-    rank: json['rank'] as int?,
     day: json['day'] as int?,
-    expireAt: json['expire_at'] as int?,
-    remainDays: json['remain_days'] as int?,
   );
 }