Move metrics into its own crate

src/fullnode.rs

@@ -11,12 +11,12 @@ use rpc::JsonRpcService;
 use rpc_pubsub::PubSubService;
 use service::Service;
 use signature::{Keypair, KeypairUtil};
+use solana_sdk::timing::timestamp;
 use std::net::UdpSocket;
 use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, RwLock};
 use std::thread::Result;
-use timing::timestamp;
 use tpu::{Tpu, TpuReturnType};
 use tvu::{Tvu, TvuReturnType};
 use untrusted::Input;