Remove loop from docstring for asyncio.streams.open_connection (pytho…

…n#108528)

Lib/asyncio/streams.py

@@ -67,9 +67,8 @@ async def start_server(client_connected_cb, host=None, port=None, *,
  positional host and port, with various optional keyword arguments
  following. The return value is the same as loop.create_server().
 
- Additional optional keyword arguments are loop (to set the event loop
- instance to use) and limit (to set the buffer limit passed to the
- StreamReader).
+ Additional optional keyword argument is limit (to set the buffer
+ limit passed to the StreamReader).
 
  The return value is the same as loop.create_server(), i.e. a
  Server object which can be used to stop the service.