Remove extern crate (#5922)

* Remove extern crate

beacon_node/lighthouse_network/src/lib.rs

@@ -2,9 +2,6 @@
 /// all required libp2p functionality.
 ///
 /// This crate builds and manages the libp2p services required by the beacon node.
-#[macro_use]
-extern crate lazy_static;
-
 mod config;
 pub mod service;
 

beacon_node/lighthouse_network/src/metrics.rs

@@ -1,5 +1,7 @@
 pub use lighthouse_metrics::*;
 
+use lazy_static::lazy_static;
+
 lazy_static! {
     pub static ref NAT_OPEN: Result<IntGaugeVec> = try_create_int_gauge_vec(
         "nat_open",

beacon_node/lighthouse_network/src/peer_manager/peerdb/score.rs

@@ -6,6 +6,7 @@
 //!
 //! The scoring algorithms are currently experimental.
 use crate::service::gossipsub_scoring_parameters::GREYLIST_THRESHOLD as GOSSIPSUB_GREYLIST_THRESHOLD;
+use lazy_static::lazy_static;
 use serde::Serialize;
 use std::time::Instant;
 use strum::AsRefStr;

beacon_node/lighthouse_network/src/rpc/protocol.rs

@@ -3,6 +3,7 @@ use crate::rpc::codec::{base::BaseInboundCodec, ssz_snappy::SSZSnappyInboundCode
 use futures::future::BoxFuture;
 use futures::prelude::{AsyncRead, AsyncWrite};
 use futures::{FutureExt, StreamExt};
+use lazy_static::lazy_static;
 use libp2p::core::{InboundUpgrade, UpgradeInfo};
 use ssz::Encode;
 use ssz_types::VariableList;