Only update the sleep implementation

Author: PiJoules

library/std/src/sys/thread/unix.rs

@@ -731,7 +731,7 @@ pub fn sleep_until(deadline: crate::time::Instant) {
     }
 }
 
-#[cfg(any(target_vendor = "apple", target_os = "fuchsia"))]
+#[cfg(target_vendor = "apple")]
 pub fn sleep_until(deadline: crate::time::Instant) {
     unsafe extern "C" {
         // This is defined in the public header mach/mach_time.h alongside

library/std/src/thread/functions.rs

@@ -316,7 +316,6 @@ pub fn sleep(dur: Duration) {
 /// | Illumos   | [clock_nanosleep] (Monotonic Clock)]                                 |
 /// | Dragonfly | [clock_nanosleep] (Monotonic Clock)]                                 |
 /// | Hurd      | [clock_nanosleep] (Monotonic Clock)]                                 |
-/// | Fuchsia   | [nanosleep] (Monotonic Clock)]                                       |
 /// | Vxworks   | [clock_nanosleep] (Monotonic Clock)]                                 |
 /// | Apple     | `mach_wait_until`                                                    |
 /// | Other     | `sleep_until` uses [`sleep`] and does not issue a syscall itself     |