Fixing some clippy warnings

util/network/src/connection.rs

@@ -507,7 +507,6 @@ mod tests {
 	use std::io::{Read, Write, Error, Cursor, ErrorKind};
 	use mio::{Ready};
 	use std::collections::VecDeque;
-	use util::bytes::*;
 	use devtools::*;
 	use io::*;
 

util/network/src/discovery.rs

@@ -555,10 +555,6 @@ impl Discovery {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use util::hash::*;
-	use util::sha3::*;
-	use std::net::*;
-	use node_table::*;
 	use std::str::FromStr;
 	use rustc_serialize::hex::FromHex;
 	use ethkey::{Random, Generator};

util/network/src/handshake.rs

@@ -333,7 +333,6 @@ mod test {
 	use std::sync::Arc;
 	use rustc_serialize::hex::FromHex;
 	use super::*;
-	use util::hash::*;
 	use io::*;
 	use mio::tcp::TcpStream;
 	use stats::NetworkStats;

util/network/src/node_table.rs

@@ -358,8 +358,6 @@ pub fn is_valid_node_url(url: &str) -> bool {
 mod tests {
 	use super::*;
 	use std::str::FromStr;
-	use std::net::*;
-	use util::hash::*;
 	use devtools::*;
 	use AllowIP;