Build fix for wasm.

substrate/executor/src/wasm_executor.rs

@@ -240,7 +240,6 @@ mod tests {
 
 	use super::*;
 	use rustc_hex::FromHex;
-	use primitives::ed25519::hexdisplay::HexDisplay;
 
 	#[derive(Debug, Default)]
 	struct TestExternalities {

substrate/wasm-runtime/polkadot/src/runtime/staking.rs

@@ -1,3 +1,4 @@
+use runtime_support::Vec;
 use keyedvec::KeyedVec;
 use storable::{Storable, StorageVec};
 use primitives::{BlockNumber, Balance, AccountID};