Fix: remove unnecessary unsafe block for safe sched_setscheduler call

src/header/spawn/mod.rs

@@ -636,7 +636,7 @@ unsafe fn do_spawn(
                 sched_priority: inner.sched_priority,
             };
             if flags & POSIX_SPAWN_SETSCHEDULER != 0 {
-                unsafe { sched::sched_setscheduler(0, inner.schedpolicy, &param) };
+                sched::sched_setscheduler(0, inner.schedpolicy, &param);
             }
             if flags & POSIX_SPAWN_SETSCHEDPARAM != 0 {
                 unsafe { sched::sched_setparam(0, &param) };