message: [clean] fix startup_info warning.
diff: @@ -9,7 +9,6 @@ use serde::{Deserialize, Serialize};
  use starcoin_crypto::HashValue;
  use std::convert::{TryFrom, TryInto};
  -use std::env::split_paths;
  #[derive(Eq, PartialEq, Hash, Deserialize, Serialize, Clone, Debug)]
  pub struct ChainInfo {
  @@ -107,7 +106,7 @@ impl ChainInfo {
  if number < len {
  Some(
  self.hash_number
  - .get::<usize>((number as usize))
  + .get::<usize>(number as usize)
  .unwrap()
  .clone(),
  )
  