message: Fix access_log_manager_impl unused variable warning
  Don't use structured binding to iterate access logs, log_key is unused
diff: @@ -20,8 +20,8 @@ AccessLogManagerImpl::~AccessLogManagerImpl() {
  }
  void AccessLogManagerImpl::reopen() {
  - for (auto& [log_key, log_file_ptr] : access_logs_) {
  - log_file_ptr->reopen();
  + for (auto& iter : access_logs_) {
  + iter.second->reopen();
  }
  }
  