message: test: fix linked_hash_set test relying on random state
diff: @@ -192,7 +192,6 @@ impl<K> ExactSizeIterator for IntoIter<K> {
  mod tests {
  use super::*;
  use numext_fixed_hash::{h256, H256};
  - use std::collections::HashSet as StdHashSet;
  #[test]
  fn insertion_order() {
  @@ -205,12 +204,6 @@ mod tests {
  let txs = vec![tx1, tx2, tx3, tx4, tx5, tx6];
  - let mut std_set = StdHashSet::new();
  - std_set.extend(txs.iter().cloned());
  - // std hashset do not keep insertion order
  - let diff: Vec<H256> = std_set.difference(&StdHashSet::new()).cloned().collect();
  - assert!(txs != diff);
  -
  let mut set = LinkedHashSet::default();
  set.extend(txs.iter().cloned());
  let diff: Vec<H256> = set.difference(&LinkedHashSet::default()).cloned().collect();
  