Fixing some clippy warnings

ethcore/src/executive.rs

@@ -445,7 +445,7 @@ impl<'a> Executive<'a> {
 
 		trace!("exec::finalize: Refunding refund_value={}, sender={}\n", refund_value, sender);
 		// Below: NoEmpty is safe since the sender must already be non-null to have sent this transaction
-		self.state.add_balance(&sender, &refund_value, CleanupMode::NoEmpty);  
+		self.state.add_balance(&sender, &refund_value, CleanupMode::NoEmpty);
 		trace!("exec::finalize: Compensating author: fees_value={}, author={}\n", fees_value, &self.info.author);
 		self.state.add_balance(&self.info.author, &fees_value, substate.to_cleanup_mode(&schedule));
 
@@ -516,7 +516,6 @@ impl<'a> Executive<'a> {
 mod tests {
 	use ethkey::{Generator, Random};
 	use super::*;
-	use util::*;
 	use action_params::{ActionParams, ActionValue};
 	use env_info::EnvInfo;
 	use evm::{Factory, VMType};