message: remove Genesis get_leader_at
diff: @@ -104,18 +104,6 @@ impl GenesisLeaderSelection {
  _ => Verification::Failure(Error::new(ErrorKind::InvalidLeaderSignature)),
  }
  }
  -
  - #[inline]
  - pub(crate) fn get_leader_at(
  - &self,
  - vrf_key: &SecretKey<Curve25519_2HashDH>,
  - date: BlockDate,
  - ) -> Result<GenesisPraosLeader, Error> {
  - match self.leader(vrf_key, date)? {
  - Some(keys) => Ok(keys),
  - None => Err(Error::new(ErrorKind::NoLeaderForThisSlot)),
  - }
  - }
  }
  impl property::Serialize for GenesisPraosId {
  