Strip out old code

All of these files have been moved to either:

- https://github.com/sigp/lighthouse-beacon
- https://github.com/sigp/lighthouse-validator
- https://github.com/sigp/lighthouse-common

For rationale, see: https://github.com/sigp/lighthouse/issues/197

eth2/attester/src/test_utils/simulated_beacon_node.rs

@@ -1,44 +0,0 @@
-use crate::traits::{BeaconNode, BeaconNodeError, PublishOutcome};
-use std::sync::RwLock;
-use types::{AttestationData, FreeAttestation, Slot};
-
-type ProduceResult = Result<Option<AttestationData>, BeaconNodeError>;
-type PublishResult = Result<PublishOutcome, BeaconNodeError>;
-
-/// A test-only struct used to simulate a Beacon Node.
-#[derive(Default)]
-pub struct SimulatedBeaconNode {
-    pub produce_input: RwLock<Option<(Slot, u64)>>,
-    pub produce_result: RwLock<Option<ProduceResult>>,
-
-    pub publish_input: RwLock<Option<FreeAttestation>>,
-    pub publish_result: RwLock<Option<PublishResult>>,
-}
-
-impl SimulatedBeaconNode {
-    pub fn set_next_produce_result(&self, result: ProduceResult) {
-        *self.produce_result.write().unwrap() = Some(result);
-    }
-
-    pub fn set_next_publish_result(&self, result: PublishResult) {
-        *self.publish_result.write().unwrap() = Some(result);
-    }
-}
-
-impl BeaconNode for SimulatedBeaconNode {
-    fn produce_attestation_data(&self, slot: Slot, shard: u64) -> ProduceResult {
-        *self.produce_input.write().unwrap() = Some((slot, shard));
-        match *self.produce_result.read().unwrap() {
-            Some(ref r) => r.clone(),
-            None => panic!("TestBeaconNode: produce_result == None"),
-        }
-    }
-
-    fn publish_attestation_data(&self, free_attestation: FreeAttestation) -> PublishResult {
-        *self.publish_input.write().unwrap() = Some(free_attestation.clone());
-        match *self.publish_result.read().unwrap() {
-            Some(ref r) => r.clone(),
-            None => panic!("TestBeaconNode: publish_result == None"),
-        }
-    }
-}