Remove type specialization

Author: srittau

stdlib/mailbox.pyi

@@ -137,7 +137,7 @@ class Maildir(Mailbox[MaildirMessage]):
     def __setitem__(self, key: str, message: _MessageData | MaildirMessage) -> None: ...
     def get_message(self, key: str) -> MaildirMessage: ...
     def get_bytes(self, key: str) -> bytes: ...
-    def get_file(self, key: str) -> _ProxyFile[bytes]: ...
+    def get_file(self, key: str) -> _ProxyFile: ...
     if sys.version_info >= (3, 13):
         def get_info(self, key: str) -> str: ...
         def set_info(self, key: str, info: str) -> None: ...
@@ -174,7 +174,7 @@ class _singlefileMailbox(Mailbox[_MessageT_co], metaclass=ABCMeta):
 
 class _mboxMMDF(_singlefileMailbox[_MessageT_co]):
     def get_message(self, key: str) -> _MessageT_co: ...
-    def get_file(self, key: str, from_: bool = False) -> _PartialFile[bytes]: ...
+    def get_file(self, key: str, from_: bool = False) -> _PartialFile: ...
     def get_bytes(self, key: str, from_: bool = False) -> bytes: ...
     def get_string(self, key: str, from_: bool = False) -> str: ...
 
@@ -197,7 +197,7 @@ class MH(Mailbox[MHMessage]):
     def __setitem__(self, key: str, message: _MessageData) -> None: ...
     def get_message(self, key: str) -> MHMessage: ...
     def get_bytes(self, key: str) -> bytes: ...
-    def get_file(self, key: str) -> _ProxyFile[bytes]: ...
+    def get_file(self, key: str) -> _ProxyFile: ...
     def iterkeys(self) -> Iterator[str]: ...
     def __contains__(self, key: str) -> bool: ...
     def __len__(self) -> int: ...