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/Cargo.toml

@@ -1,23 +0,0 @@
-[package]
-name = "beacon_node"
-version = "0.1.0"
-authors = ["Paul Hauner <paul@paulhauner.com>"]
-edition = "2018"
-
-[dependencies]
-bls = { path = "../eth2/utils/bls" }
-beacon_chain = { path = "beacon_chain" }
-grpcio = { version = "0.4", default-features = false, features = ["protobuf-codec"] }
-protobuf = "2.0.2"
-protos = { path = "../protos" }
-clap = "2.32.0"
-db = { path = "db" }
-dirs = "1.0.3"
-futures = "0.1.23"
-slog = "^2.2.3"
-slot_clock = { path = "../eth2/utils/slot_clock" }
-slog-term = "^2.4.0"
-slog-async = "^2.3.0"
-types = { path = "../eth2/types" }
-ssz = { path = "../eth2/utils/ssz" }
-tokio = "0.1"