squash this. delete some trace statements, trigger ci restart

ethcore/src/engines/clique/signer_snapshot.rs

@@ -108,7 +108,6 @@ impl CliqueState {
  /// Apply an new header
  pub fn apply(&mut self, header: &Header) -> Result<(), Error> {
  let db = self.states_by_hash.borrow_mut();
- trace!(target: "engine", "applying header {}", header.hash());
 
  // make sure current hash is not in the db
  match db.get_mut(header.parent_hash()).cloned() {
@@ -128,7 +127,6 @@ impl CliqueState {
  new_state.recent_signers.pop_back();
  }
 
- trace!(target: "engine", "inserting {} {:?}", header.hash(), &new_state);
  db.insert(header.hash(), new_state.clone());
  Ok(())
  }
@@ -204,7 +202,6 @@ fn extract_signers(header: &Header) -> Result<Vec<Address>, Error> {
  // NOTE: base on geth implmentation , signers list area always sorted to ascending order.
  signers_list.sort();
 
- trace!(target: "engine", "extracted signers {:?}", &signers_list);
  Ok(signers_list)
 }
 
@@ -261,14 +258,10 @@ fn clique_hash(h: &Header) -> U256 {
 /// Apply header to the state, used in block sealing and external block import
 fn process_header(header: &Header, state: &mut SnapshotState, epoch_length: u64) -> Result<Address, Error> {
 
- trace!(target: "engine", "called process_header for {}", header.number());
-
  if header.extra_data().len() < SIGNER_VANITY_LENGTH as usize + SIGNER_SIG_LENGTH as usize {
  return Err(From::from(format!("header extra data was too small: {}", header.extra_data().len())));
  }
 
- trace!(target: "engine", "extra_data field has valid length: {:?}", header.extra_data());
-
  let creator = public_to_address(&recover(header).unwrap()).clone();
 
  match state.get_signer_authorization(header.number(), &creator) {