Fixing clippy warnings (#1568)

* Fixing clippy warnings

* Fixing more warnings

rpc/src/v1/impls/eth_filter.rs

@@ -21,7 +21,6 @@ use std::sync::{Arc, Weak, Mutex};
 use std::collections::HashSet;
 use jsonrpc_core::*;
 use util::Lockable;
-use util::numbers::*;
 use ethcore::miner::MinerService;
 use ethcore::filter::Filter as EthcoreFilter;
 use ethcore::client::{BlockChainClient, BlockID};

rpc/src/v1/tests/mocked/eth.rs

@@ -18,7 +18,7 @@ use std::str::FromStr;
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
 use jsonrpc_core::IoHandler;
-use util::{Lockable, RwLockable};
+use util::RwLockable;
 use util::hash::{Address, H256, FixedHash};
 use util::numbers::{Uint, U256};
 use ethcore::account_provider::AccountProvider;