Fix test compilation.

ethcore/src/miner/miner.rs

@@ -130,7 +130,6 @@ impl Miner {
 			next_allowed_reseal: Mutex::new(Instant::now()),
 			sealing_block_last_request: Mutex::new(0),
 			sealing_work: Mutex::new(UsingQueue::new(options.work_queue_size)),
-			options: options,
 			gas_range_target: RwLock::new((U256::zero(), U256::zero())),
 			author: RwLock::new(Address::default()),
 			extra_data: RwLock::new(Vec::new()),