message: Fix compilation errors after merge conflicts.
diff: @@ -20,8 +20,6 @@ use utils::crypto::hash::hash as openssl_hash;
  use super::PoolService;
  use super::types::*;
  -use digest::FixedOutput;
  -use digest::Input;
  use self::log_derive::logfn;
  use ursa::bls::{Bls, Generator, MultiSignature, VerKey};
  use self::node::{Node, TrieDB};
  