dissolve util (#7460)

* ethereum-types refactor in progress

* ethereum-types refactor in progress

* ethereum-types refactor in progress

* ethereum-types refactor in progress

* ethereum-types refactor finished

* removed obsolete util/src/lib.rs

* removed commented out code

sync/src/light_sync/mod.rs

@@ -45,8 +45,7 @@ use light::net::{
 };
 use light::request::{self, CompleteHeadersRequest as HeadersRequest};
 use network::PeerId;
-use bigint::prelude::U256;
-use bigint::hash::H256;
+use ethereum_types::{H256, U256};
 use parking_lot::{Mutex, RwLock};
 use rand::{Rng, OsRng};
 

sync/src/light_sync/response.rs

@@ -22,7 +22,7 @@ use ethcore::encoded;
 use ethcore::header::Header;
 use light::request::{HashOrNumber, CompleteHeadersRequest as HeadersRequest};
 use rlp::DecoderError;
-use bigint::hash::H256;
+use ethereum_types::H256;
 
 /// Errors found when decoding headers and verifying with basic constraints.
 #[derive(Debug, PartialEq)]

sync/src/light_sync/sync_round.rs

@@ -27,7 +27,7 @@ use light::net::ReqId;
 use light::request::CompleteHeadersRequest as HeadersRequest;
 
 use network::PeerId;
-use bigint::hash::H256;
+use ethereum_types::H256;
 
 use super::response;