message: Remove unnecessary leader checks.
diff: @@ -573,8 +573,6 @@ mod tests {
  assert_eq!(BOB, state.leader(Timestamp::from(0)));
  assert_eq!(BOB, state.leader(Timestamp::from(8)));
  assert_eq!(ALICE, state.leader(Timestamp::from(16)));
  - assert_eq!(CAROL, state.leader(Timestamp::from(24)));
  - assert_eq!(ALICE, state.leader(Timestamp::from(32)));
  // Payouts for a block happen at the first occasion after `REWARD_DELAY` times the block's
  // round length.
  