Remove SIGCHLD `waidpid`. (#7476)

* Remove `waitpid_lock` and related code.

* Remove un-necessary test.

* Remove `rb_thread_sleep_interruptible` dead code.

1 files changed, 0 insertions, 2 deletions

diff --git a/thread_pthread.c b/thread_pthread.c
index 9723a5f6b4..c523509b9f 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -348,7 +348,6 @@ do_gvl_timer(struct rb_thread_sched *sched, rb_thread_t *th)
     sched->timer_err = native_cond_timedwait(&th->nt->cond.readyq, &sched->lock, &abs);
 
     ubf_wakeup_all_threads();
-    ruby_sigchld_handler(vm);
 
     if (UNLIKELY(rb_signal_buff_size())) {
         if (th == vm->ractor.main_thread) {
@@ -2359,7 +2358,6 @@ native_sleep(rb_thread_t *th, rb_hrtime_t *rel)
         THREAD_BLOCKING_END(th);
 
         rb_sigwait_fd_put(th, sigwait_fd);
-        rb_sigwait_fd_migrate(th->vm);
     }
     else if (th == th->vm->ractor.main_thread) { /* always able to handle signals */
         native_ppoll_sleep(th, rel);