message: Remove redundant log output
diff: @@ -931,11 +931,9 @@ producer_plugin_impl::start_block_result producer_plugin_impl::start_block(bool
  if (_pending_block_mode == pending_block_mode::speculating) {
  auto head_block_age = now - chain.head_block_time();
  - if (head_block_age > fc::seconds(5)) {
  - fc_dlog(_log, "Greater than 5 secs behind, waiting");
  + if (head_block_age > fc::seconds(5))
  return start_block_result::waiting;
  }
  - }
  try {
  uint16_t blocks_to_confirm = 0;
  