clean up models

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

lib/models_new/pgc/pgc_rank/stat.dart

@@ -1,15 +1,11 @@
 class Stat {
-  int? danmaku;
   int? follow;
-  int? seriesFollow;
   int? view;
 
-  Stat({this.danmaku, this.follow, this.seriesFollow, this.view});
+  Stat({this.follow, this.view});
 
   factory Stat.fromJson(Map<String, dynamic> json) => Stat(
-    danmaku: json['danmaku'] as int?,
     follow: (json['follow'] as int?) ?? 0,
-    seriesFollow: json['series_follow'] as int?,
     view: (json['view'] as int?) ?? 0,
   );
 }