message: Fixed clippy warning: unneeded return statement
diff: @@ -265,7 +265,7 @@ impl MmapDirectoryInner {
  }
  }
  if let Some(watch_wrapper) = self.watcher.write().unwrap().as_mut() {
  - return Ok(watch_wrapper.watch(watch_callback));
  + Ok(watch_wrapper.watch(watch_callback))
  } else {
  unreachable!("At this point, watch wrapper is supposed to be initialized");
  }
  