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

beacon_node/src/rpc/beacon_block.rs

@@ -1,57 +0,0 @@
-use futures::Future;
-use grpcio::{RpcContext, UnarySink};
-use protos::services::{
-    BeaconBlock as BeaconBlockProto, ProduceBeaconBlockRequest, ProduceBeaconBlockResponse,
-    PublishBeaconBlockRequest, PublishBeaconBlockResponse,
-};
-use protos::services_grpc::BeaconBlockService;
-use slog::Logger;
-
-#[derive(Clone)]
-pub struct BeaconBlockServiceInstance {
-    pub log: Logger,
-}
-
-impl BeaconBlockService for BeaconBlockServiceInstance {
-    /// Produce a `BeaconBlock` for signing by a validator.
-    fn produce_beacon_block(
-        &mut self,
-        ctx: RpcContext,
-        req: ProduceBeaconBlockRequest,
-        sink: UnarySink<ProduceBeaconBlockResponse>,
-    ) {
-        println!("producing at slot {}", req.get_slot());
-
-        // TODO: build a legit block.
-        let mut block = BeaconBlockProto::new();
-        block.set_slot(req.get_slot());
-        block.set_block_root(b"cats".to_vec());
-
-        let mut resp = ProduceBeaconBlockResponse::new();
-        resp.set_block(block);
-
-        let f = sink
-            .success(resp)
-            .map_err(move |e| println!("failed to reply {:?}: {:?}", req, e));
-        ctx.spawn(f)
-    }
-
-    /// Accept some fully-formed `BeaconBlock`, process and publish it.
-    fn publish_beacon_block(
-        &mut self,
-        ctx: RpcContext,
-        req: PublishBeaconBlockRequest,
-        sink: UnarySink<PublishBeaconBlockResponse>,
-    ) {
-        println!("publishing {:?}", req.get_block());
-
-        // TODO: actually process the block.
-        let mut resp = PublishBeaconBlockResponse::new();
-        resp.set_success(true);
-
-        let f = sink
-            .success(resp)
-            .map_err(move |e| println!("failed to reply {:?}: {:?}", req, e));
-        ctx.spawn(f)
-    }
-}