message: Remove never-taken if condition with explicit panic
diff: @@ -738,10 +738,6 @@ impl reactor::Reactor for Reactor {
  Some(deploy) => {
  match Message::new_get_response(&deploy) {
  Ok(message) => {
  - if self.storage.mem_duplication_enabled() {
  - todo!("update cache if enabled")
  - }
  -
  return effect_builder
  .send_message(sender, message)
  .ignore();
  