Fix compiler warnings

src/rpc.rs

@@ -6,7 +6,7 @@ use crate::packet::PACKET_DATA_SIZE;
 use crate::storage_stage::StorageState;
 use bincode::{deserialize, serialize};
 use bs58;
-use jsonrpc_core::{Error, ErrorCode, MetaIoHandler, Metadata, Result};
+use jsonrpc_core::{Error, ErrorCode, Metadata, Result};
 use jsonrpc_derive::rpc;
 use solana_drone::drone::request_airdrop_transaction;
 use solana_sdk::account::Account;
@@ -17,7 +17,7 @@ use std::mem;
 use std::net::{SocketAddr, UdpSocket};
 use std::str::FromStr;
 use std::sync::{Arc, RwLock};
-use std::thread::{self, sleep};
+use std::thread::sleep;
 use std::time::{Duration, Instant};
 
 #[derive(Clone)]

src/rpc_pubsub.rs

@@ -8,13 +8,12 @@ use jsonrpc_core::futures::Future;
 use jsonrpc_core::{Error, ErrorCode, Result};
 use jsonrpc_derive::rpc;
 use jsonrpc_pubsub::typed::Subscriber;
-use jsonrpc_pubsub::{PubSubHandler, Session, SubscriptionId};
+use jsonrpc_pubsub::{Session, SubscriptionId};
 use solana_sdk::account::Account;
 use solana_sdk::pubkey::Pubkey;
 use solana_sdk::signature::Signature;
 use std::mem;
 use std::sync::{atomic, Arc, RwLock};
-use std::time::Duration;
 
 #[rpc]
 pub trait RpcSolPubSub {

src/rpc_subscriptions.rs

@@ -1,9 +1,9 @@
 //! The `pubsub` module implements a threaded subscription service on client RPC request
 
-use crate::bank::{self, Bank, BankError};
+use crate::bank::{self, BankError};
 use crate::rpc::RpcSignatureStatus;
 use jsonrpc_core::futures::Future;
-use jsonrpc_pubsub::typed::{Sink, Subscriber};
+use jsonrpc_pubsub::typed::Sink;
 use jsonrpc_pubsub::SubscriptionId;
 use solana_sdk::account::Account;
 use solana_sdk::pubkey::Pubkey;