Revert "Adjust atomics in the lio_listio doc test"

As these changes are not necessary

Author: SteveLauC

src/sys/aio.rs

@@ -1176,12 +1176,12 @@ pub fn aio_suspend(
 /// pub static SIGNALED: AtomicBool = AtomicBool::new(false);
 ///
 /// extern fn sigfunc(_: c_int) {
-///     SIGNALED.store(true, Ordering::Release);
+///     SIGNALED.store(true, Ordering::Relaxed);
 /// }
 /// let sa = SigAction::new(SigHandler::Handler(sigfunc),
 ///                         SaFlags::SA_RESETHAND,
 ///                         SigSet::empty());
-/// SIGNALED.store(false, Ordering::Release);
+/// SIGNALED.store(false, Ordering::Relaxed);
 /// unsafe { sigaction(Signal::SIGUSR2, &sa) }.unwrap();
 ///
 /// const WBUF: &[u8] = b"abcdef123456";
@@ -1195,7 +1195,7 @@ pub fn aio_suspend(
 /// ));
 /// let sev = SigevNotify::SigevSignal { signal: Signal::SIGUSR2, si_value: 0 };
 /// lio_listio(LioMode::LIO_NOWAIT, &mut[aiow.as_mut()], sev).unwrap();
-/// while !SIGNALED.load(Ordering::Acquire) {
+/// while !SIGNALED.load(Ordering::Relaxed) {
 ///     thread::sleep(time::Duration::from_millis(10));
 /// }
 /// // At this point, since `lio_listio` returned success and delivered its