Add new tree_hash crate project wide.

validator_client/Cargo.toml

@@ -17,6 +17,7 @@ block_proposer = { path = "../eth2/block_proposer" }
 attester = { path = "../eth2/attester" }
 bls = { path = "../eth2/utils/bls" }
 ssz = { path = "../eth2/utils/ssz" }
+tree_hash = { path = "../eth2/utils/tree_hash" }
 clap = "2.32.0"
 dirs = "1.0.3"
 grpcio = { version = "0.4", default-features = false, features = ["protobuf-codec"] }

validator_client/src/block_producer/mod.rs

@@ -6,8 +6,8 @@ pub use self::beacon_node_block::{BeaconNodeError, PublishOutcome};
 pub use self::grpc::BeaconBlockGrpcClient;
 use crate::signer::Signer;
 use slog::{error, info, warn};
-use ssz::{SignedRoot, TreeHash};
 use std::sync::Arc;
+use tree_hash::{SignedRoot, TreeHash};
 use types::{BeaconBlock, ChainSpec, Domain, Fork, Slot};
 
 #[derive(Debug, PartialEq)]