Remove some unused trait imports

Cargo.toml

@@ -1,7 +1,7 @@
 
 [package]
 name = "bitcoin"
-version = "0.5.8"
+version = "0.5.9"
 authors = ["Andrew Poelstra <apoelstra@wpsoftware.net>"]
 license = "CC0-1.0"
 homepage = "https://github.com/apoelstra/rust-bitcoin/"

src/blockdata/block.rs

@@ -26,7 +26,7 @@ use util;
 use util::Error::{SpvBadTarget, SpvBadProofOfWork};
 use util::hash::Sha256dHash;
 use util::uint::Uint256;
-use network::encodable::{ConsensusEncodable, VarInt};
+use network::encodable::VarInt;
 use network::serialize::BitcoinHash;
 use blockdata::transaction::Transaction;
 

src/blockdata/transaction.rs

@@ -29,7 +29,6 @@ use serde;
 
 use util::hash::Sha256dHash;
 use blockdata::script::{self, Script, ScriptTrace};
-use network::encodable::ConsensusEncodable;
 use network::serialize::BitcoinHash;
 
 /// A reference to a transaction output

src/util/hash.rs

@@ -19,7 +19,7 @@ use std::char::from_digit;
 use std::cmp::min;
 use std::default::Default;
 use std::error;
-use std::fmt::{self, Write};
+use std::fmt;
 use std::io::Cursor;
 use std::mem;
 use serde;
@@ -249,8 +249,6 @@ impl serde::Deserialize for Sha256dHash {
     fn deserialize<D>(d: &mut D) -> Result<Sha256dHash, D::Error>
         where D: serde::Deserializer
     {
-        use serialize::hex::FromHex;
-
         struct Sha256dHashVisitor;
         impl serde::de::Visitor for Sha256dHashVisitor {
             type Value = Sha256dHash;

src/util/uint.rs

@@ -321,7 +321,6 @@ macro_rules! construct_uint {
         impl<S: ::network::serialize::SimpleEncoder> ::network::encodable::ConsensusEncodable<S> for $name {
             #[inline]
             fn consensus_encode(&self, s: &mut S) -> Result<(), S::Error> {
-                use network::encodable::ConsensusEncodable;
                 let &$name(ref data) = self;
                 for word in data.iter() { try!(word.consensus_encode(s)); }
                 Ok(())