small change

Signed-off-by: Y.Hisaki <yhisaki31@gmail.com>

Author: yhisaki

perception/detected_object_validation/include/detected_object_validation/obstacle_pointcloud_based_validator/obstacle_pointcloud_based_validator.hpp

@@ -77,7 +77,7 @@ class Validator
   size_t getThresholdPointCloud(const autoware_perception_msgs::msg::DetectedObject & object);
   virtual pcl::PointCloud<pcl::PointXYZ>::Ptr getDebugNeighborPointCloud() = 0;
 
-  virtual ~Validator() = default;
+  virtual ~Validator() {}
 };
 
 class Validator2D : public Validator