Various py311 removals (#7836)

stdlib/asyncio/trsock.pyi

@@ -14,7 +14,6 @@ _CMSG: TypeAlias = tuple[int, int, bytes]
 
 class TransportSocket:
     def __init__(self, sock: socket.socket) -> None: ...
-    def _na(self, what: str) -> None: ...
     @property
     def family(self) -> int: ...
     @property
@@ -41,6 +40,7 @@ class TransportSocket:
     def gettimeout(self) -> float | None: ...
     def setblocking(self, flag: bool) -> None: ...
     if sys.version_info < (3, 11):
+        def _na(self, what: str) -> None: ...
         def accept(self) -> tuple[socket.socket, _RetAddress]: ...
         def connect(self, address: _Address | bytes) -> None: ...
         def connect_ex(self, address: _Address | bytes) -> int: ...