chore: removed non applicable override (point painting does not support the blackboard yet)

Signed-off-by: Kenzo Lobos-Tsunekawa <kenzo.lobos@tier4.jp>

Author: knzo25

perception/autoware_image_projection_based_fusion/include/autoware/image_projection_based_fusion/pointpainting_fusion/pointpainting_trt.hpp

@@ -43,8 +43,7 @@ class PointPaintingTRT : public autoware::lidar_centerpoint::CenterPointTRT
 
 protected:
   bool preprocess(
-    const sensor_msgs::msg::PointCloud2 & input_pointcloud_msg,
-    const tf2_ros::Buffer & tf_buffer) override;
+    const sensor_msgs::msg::PointCloud2 & input_pointcloud_msg, const tf2_ros::Buffer & tf_buffer);
 
   std::unique_ptr<image_projection_based_fusion::VoxelGenerator> vg_ptr_pp_{nullptr};
 };