rust: remove extra empty line

This is a gratuitous cleanup.

Differential Revision: https://phab.mercurial-scm.org/D8460

rust/hg-core/src/dirstate/status.rs

@@ -307,7 +307,6 b' pub struct StatusOptions {'
 /// Dispatch a single entry (file, folder, symlink...) found during `traverse`.
 /// If the entry is a folder that needs to be traversed, it will be handled
 /// in a separate thread.
-
 fn handle_traversed_entry<'a>(
     scope: &rayon::Scope<'a>,
     files_sender: &'a crossbeam::Sender<IoResult<(HgPathBuf, Dispatch)>>,