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/utils/ssz/src/lib.rs

@@ -1,38 +0,0 @@
-/*
- * This is a WIP of implementing an alternative
- * serialization strategy. It attempts to follow Vitalik's
- * "simpleserialize" format here:
- * https://github.com/ethereum/beacon_chain/blob/master/beacon_chain/utils/simpleserialize.py
- *
- * This implementation is not final and would almost certainly
- * have issues.
- */
-extern crate bytes;
-extern crate ethereum_types;
-
-pub mod decode;
-pub mod encode;
-pub mod tree_hash;
-
-mod impl_decode;
-mod impl_encode;
-mod impl_tree_hash;
-
-pub use crate::decode::{decode_ssz, decode_ssz_list, Decodable, DecodeError};
-pub use crate::encode::{Encodable, SszStream};
-pub use crate::tree_hash::{merkle_hash, TreeHash};
-
-pub use hashing::hash;
-
-pub const LENGTH_BYTES: usize = 4;
-pub const MAX_LIST_SIZE: usize = 1 << (4 * 8);
-
-/// Convenience function to SSZ encode an object supporting ssz::Encode.
-pub fn ssz_encode<T>(val: &T) -> Vec<u8>
-where
-    T: Encodable,
-{
-    let mut ssz_stream = SszStream::new();
-    ssz_stream.append(val);
-    ssz_stream.drain()
-}