Remove unused imports (#3589)

* Remove unused imports

core/src/core/committed.rs

@@ -15,7 +15,6 @@
 //! The Committed trait and associated errors.
 
 use failure::Fail;
-use keychain;
 use keychain::BlindingFactor;
 use util::secp::key::SecretKey;
 use util::secp::pedersen::Commitment;

core/src/genesis.rs

@@ -24,7 +24,6 @@ use crate::core::hash::Hash;
 use crate::pow::{Difficulty, Proof, ProofOfWork};
 use chrono::prelude::{TimeZone, Utc};
 use keychain::BlindingFactor;
-use util;
 use util::secp::constants::SINGLE_BULLET_PROOF_SIZE;
 use util::secp::pedersen::{Commitment, RangeProof};
 use util::secp::Signature;

core/src/global.rs

@@ -17,10 +17,10 @@
 //! should be used sparingly.
 
 use crate::consensus::{
-	graph_weight, header_version, HeaderInfo, BASE_EDGE_BITS, BLOCK_TIME_SEC,
+	graph_weight, header_version, HeaderInfo, BASE_EDGE_BITS, BLOCK_TIME_SEC, C32_GRAPH_WEIGHT,
-	C32_GRAPH_WEIGHT, COINBASE_MATURITY, CUT_THROUGH_HORIZON, DAY_HEIGHT, DEFAULT_MIN_EDGE_BITS,
+	COINBASE_MATURITY, CUT_THROUGH_HORIZON, DAY_HEIGHT, DEFAULT_MIN_EDGE_BITS, DMA_WINDOW,
-	DMA_WINDOW, GRIN_BASE, INITIAL_DIFFICULTY, KERNEL_WEIGHT, MAX_BLOCK_WEIGHT,
+	GRIN_BASE, INITIAL_DIFFICULTY, KERNEL_WEIGHT, MAX_BLOCK_WEIGHT, OUTPUT_WEIGHT, PROOFSIZE,
-	OUTPUT_WEIGHT, PROOFSIZE, SECOND_POW_EDGE_BITS, STATE_SYNC_THRESHOLD,
+	SECOND_POW_EDGE_BITS, STATE_SYNC_THRESHOLD,
 };
 use crate::core::block::HeaderVersion;
 use crate::pow::{

core/src/lib.rs

@@ -27,10 +27,8 @@ extern crate enum_primitive;
 extern crate lazy_static;
 #[macro_use]
 extern crate serde_derive;
-use serde;
 #[macro_use]
 extern crate log;
-use failure;
 #[macro_use]
 extern crate failure_derive;
 #[macro_use]

core/src/libtx/error.rs

@@ -15,7 +15,6 @@
 //! libtx specific errors
 use crate::core::transaction;
 use failure::{Backtrace, Context, Fail};
-use keychain;
 use std::fmt::{self, Display};
 use util::secp;
 

core/src/libtx/secp_ser.rs

@@ -53,8 +53,8 @@ pub mod pubkey_serde {
 
 /// Serializes an Option<secp::Signature> to and from hex
 pub mod option_sig_serde {
-	use crate::serde::{Deserialize, Deserializer, Serializer};
 	use serde::de::Error;
+	use serde::{Deserialize, Deserializer, Serializer};
 	use util::{from_hex, secp, static_secp_instance, ToHex};
 
 	///
@@ -99,8 +99,8 @@ pub mod option_sig_serde {
 
 /// Serializes an Option<secp::SecretKey> to and from hex
 pub mod option_seckey_serde {
-	use crate::serde::{Deserialize, Deserializer, Serializer};
 	use serde::de::Error;
+	use serde::{Deserialize, Deserializer, Serializer};
 	use util::{from_hex, secp, static_secp_instance, ToHex};
 
 	///
@@ -144,8 +144,8 @@ pub mod option_seckey_serde {
 
 /// Serializes a secp::Signature to and from hex
 pub mod sig_serde {
-	use crate::serde::{Deserialize, Deserializer, Serializer};
 	use serde::de::Error;
+	use serde::{Deserialize, Deserializer, Serializer};
 	use util::{from_hex, secp, static_secp_instance, ToHex};
 
 	///
@@ -180,8 +180,8 @@ pub mod sig_serde {
 
 /// Serializes an Option<secp::Commitment> to and from hex
 pub mod option_commitment_serde {
-	use crate::serde::{Deserialize, Deserializer, Serializer};
 	use serde::de::Error;
+	use serde::{Deserialize, Deserializer, Serializer};
 	use util::secp::pedersen::Commitment;
 	use util::{from_hex, ToHex};
 

core/src/pow.rs

@@ -33,8 +33,6 @@ pub use self::types::*;
 use crate::core::{Block, BlockHeader};
 use crate::genesis;
 use crate::global;
-use chrono;
-use num;
 
 #[macro_use]
 mod common;

core/src/pow/common.rs

@@ -15,10 +15,10 @@
 //! Common types and traits for cuckoo family of solvers
 
 use crate::pow::error::Error;
-use crate::pow::num::{PrimInt, ToPrimitive};
 use crate::pow::siphash::siphash24;
 use blake2::blake2b::blake2b;
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+use num::{PrimInt, ToPrimitive};
 use std::fmt;
 use std::hash::Hash;
 use std::io::Cursor;

keychain/src/mnemonic.rs

@@ -99,7 +99,7 @@ pub fn to_entropy(mnemonic: &str) -> Result<Vec<u8>, Error> {
 
 	let mut hash = [0; 32];
 	let mut sha2sum = Sha256::default();
-	sha2sum.input(&entropy.clone());
+	sha2sum.input(&entropy);
 	hash.copy_from_slice(sha2sum.result().as_slice());
 
 	let actual = (hash[0] >> (8 - checksum_bits)) & mask;

src/build/build.rs

@@ -14,8 +14,6 @@
 
 //! Build hooks to spit out version+build time info
 
-use built;
-
 use std::env;
 use std::path::{Path, PathBuf};
 use std::process::Command;

util/src/logger.rs

@@ -19,7 +19,6 @@ use backtrace::Backtrace;
 use std::{panic, thread};
 
 use log::{Level, Record};
-use log4rs;
 use log4rs::append::console::ConsoleAppender;
 use log4rs::append::file::FileAppender;
 use log4rs::append::rolling_file::{