message: remove timedwait
diff: @@ -49,12 +49,6 @@ pub extern "C" fn sem_wait(sem: *mut sem_t) -> c_int {
  unimplemented!();
  }
  -#[no_mangle]
  -pub extern "C" fn sem_timedwait(sem: *mut sem_t, abstime: *const timespec)
  - -> c_int {
  - unimplemented!();
  -}
  -
  #[no_mangle]
  pub extern "C" fn sem_trywait(sem: *mut sem_t) -> c_int {
  unimplemented!();
  