message: [storage] trivial: remove a `use` needed in tests only
  So there's no warning when building release.
diff: @@ -15,7 +15,6 @@ use libra_types::{
  event::EventKey,
  ledger_info::LedgerInfoWithSignatures,
  move_resource::MoveStorage,
  - on_chain_config::ValidatorSet,
  proof::{definition::LeafCount, AccumulatorConsistencyProof, SparseMerkleProof},
  transaction::{TransactionListWithProof, TransactionToCommit, TransactionWithProof, Version},
  };
  @@ -59,6 +58,8 @@ impl StartupInfo {
  #[cfg(any(test, feature = "fuzzing"))]
  pub fn new_for_testing() -> Self {
  + use libra_types::on_chain_config::ValidatorSet;
  +
  let latest_ledger_info =
  LedgerInfoWithSignatures::genesis(HashValue::zero(), ValidatorSet::empty());
  let latest_epoch_state = None;
  