fix bugs

app/core/context.py

@@ -55,9 +55,6 @@ class TorrentInfo:
     # 种子优先级
     pri_order: int = 0
 
-    def __getattr__(self, attribute):
-        return None
-
     def __setattr__(self, name: str, value: Any):
         self.__dict__[name] = value
 
@@ -175,9 +172,6 @@ class MediaInfo:
         if self.douban_info:
             self.set_douban_info(self.douban_info)
 
-    def __getattr__(self, attribute):
-        return None
-
     def __setattr__(self, name: str, value: Any):
         self.__dict__[name] = value
 
@@ -518,9 +512,6 @@ class Context:
     # 种子信息
     torrent_info: TorrentInfo = None
 
-    def __getattr__(self, attribute):
-        return None
-
     def __setattr__(self, name: str, value: Any):
         self.__dict__[name] = value