Migrate srml-assets, srml-aura, srml-balances and srml-consens to the 2018 edition (#1633)

substrate/srml/balances/src/lib.rs

@@ -27,23 +27,9 @@
 #[macro_use]
 extern crate srml_support as runtime_support;
 
-extern crate sr_std as rstd;
-
-#[macro_use]
-extern crate parity_codec_derive;
-
-extern crate parity_codec as codec;
-extern crate sr_primitives as primitives;
-extern crate srml_system as system;
-
-#[cfg(test)]
-extern crate sr_io as runtime_io;
-#[cfg(test)]
-extern crate substrate_primitives;
-
 use rstd::prelude::*;
 use rstd::{cmp, result};
-use codec::Codec;
+use parity_codec::Codec;
 use runtime_support::{StorageValue, StorageMap, Parameter};
 use runtime_support::dispatch::Result;
 use primitives::traits::{Zero, SimpleArithmetic, MakePayment,

substrate/srml/balances/src/mock.rs

@@ -22,7 +22,7 @@ use primitives::BuildStorage;
 use primitives::{traits::{IdentityLookup}, testing::{Digest, DigestItem, Header}};
 use substrate_primitives::{H256, Blake2Hasher};
 use runtime_io;
-use {GenesisConfig, Module, Trait, system};
+use crate::{GenesisConfig, Module, Trait};
 
 impl_outer_origin!{
 	pub enum Origin for Runtime {}