Update cryptocurrency tests
@@ -24,8 +24,7 @@ extern crate exonum_testkit;
#[macro_use]
extern crate serde_json;
-use exonum::crypto::{self, PublicKey, SecretKey};
-use exonum::messages::Message;
+use exonum::crypto::{self, PublicKey, SecretKey, CryptoHash};
use exonum_testkit::{ApiKind, TestKit, TestKitApi, TestKitBuilder};
// Import data types used in tests from the crate where the service is defined.
