message: Don't check if signatures are sufficient if signature set wasn't updated
diff: @@ -1450,7 +1450,6 @@ async fn fetch_finality_signatures_by_block_header(
  validator_weights,
  )?;
  sig_collector.add(signatures);
  - }
  if sig_collector.check_if_sufficient(
  validator_weights,
  @@ -1465,6 +1464,7 @@ async fn fetch_finality_signatures_by_block_header(
  break;
  }
  }
  + }
  None => {
  return Err(Error::HitGenesisBlockTryingToGetTrustedEraValidators {
  trusted_header: block_header,
  