message: Removing verifier from state-synchronizer/src/lib.rs
  Closes:
  Approved by: bmwill
diff: use executor_types::ExecutedTrees;
  use libra_types::{
  - account_address::AccountAddress, epoch_state::EpochState,
  - ledger_info::LedgerInfoWithSignatures, validator_verifier::ValidatorVerifier,
  + account_address::AccountAddress, epoch_state::EpochState, ledger_info::LedgerInfoWithSignatures,
  };
  pub use synchronizer::{StateSyncClient, StateSynchronizer};
  @@ -67,10 +66,6 @@ impl SynchronizerState {
  pub fn epoch(&self) -> u64 {
  self.trusted_epoch.epoch
  }
  -
  - pub fn verifier(&self) -> &ValidatorVerifier {
  - &self.trusted_epoch.verifier
  - }
  }
  #[cfg(test)]
  