chore: remove not working busy wait select

dont compile qthreads in test env
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

runtime/src/qio/sys.c

@@ -1911,44 +1911,9 @@ err_t sys_select(int nfds, fd_set* readfds, fd_set* writefds, fd_set* exceptfds,
     return err_out;
   }
 
-#ifdef QTHREAD_VERSION
+#if defined(QTHREAD_VERSION) && !defined(CHPL_RT_UNIT_TEST)
   got_nset = qt_select(nfds, readfds, writefds, exceptfds, timeout);
 #else
-//   struct timeval deadline;
-//   struct timeval now;
-//   struct timeval real_timeout;
-//   long wait_usec = 5;
-
-//   if (timeout != NULL) {
-//     gettimeofday(&deadline, NULL);
-//     deadline.tv_sec += timeout->tv_sec;
-//     deadline.tv_usec += timeout->tv_usec;
-//     if (deadline.tv_usec > 1000000) {
-//       deadline.tv_sec++;
-//       deadline.tv_usec -= 1000000;
-//     }
-//   } else if (timeout->tv_sec == 0) {
-//     if (timeout->tv_usec < wait_usec)
-//       wait_usec = timeout->tv_usec;
-//   }
-
-//   real_timeout.tv_sec = 0;
-//   real_timeout.tv_usec = wait_usec;
-
-//   while (1) {
-//     // It would be nicer if the tasking layer supported a select
-//     // call and knew to wait in the select call if no task was waiting
-//     got_nset = select(nfds, readfds, writefds, exceptfds, &real_timeout);
-//     if (got_nset == -1) err_out = errno; // save error
-//     if (got_nset != 0) break; // exit loop if something happened
-// #ifndef CHPL_RT_UNIT_TEST
-//     chpl_task_yield();
-// #endif
-//     gettimeofday(&now, NULL);
-//     if (now.tv_sec > deadline.tv_sec ||
-//         (now.tv_sec == deadline.tv_sec && now.tv_usec > deadline.tv_usec))
-//       break;
-//   }
   got_nset = select(nfds, readfds, writefds, exceptfds, timeout);
 #endif
   if (got_nset == -1) err_out = errno; // save error