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/local_signer.rs

@@ -1,31 +0,0 @@
-use crate::traits::Signer;
-use std::sync::RwLock;
-use types::{Keypair, Signature};
-
-/// A test-only struct used to simulate a Beacon Node.
-pub struct LocalSigner {
-    keypair: Keypair,
-    should_sign: RwLock<bool>,
-}
-
-impl LocalSigner {
-    /// Produce a new LocalSigner with signing enabled by default.
-    pub fn new(keypair: Keypair) -> Self {
-        Self {
-            keypair,
-            should_sign: RwLock::new(true),
-        }
-    }
-
-    /// If set to `false`, the service will refuse to sign all messages. Otherwise, all messages
-    /// will be signed.
-    pub fn enable_signing(&self, enabled: bool) {
-        *self.should_sign.write().unwrap() = enabled;
-    }
-}
-
-impl Signer for LocalSigner {
-    fn sign_attestation_message(&self, message: &[u8]) -> Option<Signature> {
-        Some(Signature::new(message, &self.keypair.sk))
-    }
-}