test_asyncore: Optimize capture_server() (#93867)

Remove time.sleep(0.01) in test_asyncore capture_server(). The sleep
was redundant and inefficient, since the loop starts with
select.select() which also implements a sleep (poll for socket data
with a timeout).

Lib/test/test_asyncore.py

@@ -87,7 +87,6 @@ def capture_server(evt, buf, serv):
                     break
             if n <= 0:
                 break
-            time.sleep(0.01)
 
         conn.close()
     finally: