message: [Consensus][tiny] Cleanup some log lines
  Summary:
  There are too many log lines warning about the proposals from the old rounds.
  This is a pretty common case especially with secondary proposers sending them as well, so removing the log.
  Testing: unit tests
diff: @@ -208,18 +208,11 @@ impl<T: Payload> EventProcessor<T> {
  /// 2. forwarding the proposals to the ProposerElection queue,
  /// which is going to eventually trigger one winning proposal per round
  async fn pre_process_proposal(&mut self, proposal_msg: ProposalMsg<T>) -> Option<Block<T>> {
  - debug!("EventProcessor: receive proposal {}", proposal_msg);
  // Pacemaker is going to be updated with all the proposal certificates later,
  // but it's known that the pacemaker's round is not going to decrease so we can already
  // filter out the proposals from old rounds.
  let current_round = self.pacemaker.current_round();
  if proposal_msg.round() < current_round {
  - warn!(
  - "Proposal {} is ignored because its round {} < current round {}",
  - proposal_msg,
  - proposal_msg.round(),
  - current_round
  - );
  return None;
  }
  if self
  @@ -502,6 +495,7 @@ impl<T: Payload> EventProcessor<T> {
  /// 3. In case a validator chooses to vote, send the vote to the representatives at the next
  /// position.
  async fn process_proposed_block(&mut self, proposal: Block<T>) {
  + debug!("EventProcessor: process_proposed_block {}", proposal);
  // Safety invariant: For any valid proposed block, its parent block == the block pointed to
  // by its QC.
  debug_checked_precondition_eq!(
  