Remove remaining __del__ from async parser. They are not needed.

Author: kristjanvalur

redis/_parsers/base.py

@@ -138,12 +138,6 @@ def __init__(self, socket_read_size: int):
         self._stream: Optional[StreamReader] = None
         self._read_size = socket_read_size
 
-    def __del__(self):
-        try:
-            self.on_disconnect()
-        except Exception:
-            pass
-
     async def can_read_destructive(self) -> bool:
         raise NotImplementedError()