message: Remove a leftover comment.
diff: @@ -140,7 +140,6 @@ where
  fn add_vertex_dependency(&mut self, v_id: P::VId, sender: I, v: P::Vertex) {
  let dependant_id = v.id();
  self.vertex_by_vid
  - // cv_effects.push(dep_effects);
  .entry(dependant_id.clone())
  .or_insert((sender, v));
  self.vertex_dependants
  