fix(pointpainting): update parameter (#850)

Signed-off-by: kminoda <koji.minoda@tier4.jp>

Author: kminoda

autoware_launch/config/perception/object_recognition/detection/lidar_model/pointpainting.param.yaml

@@ -1,7 +1,6 @@
 /**:
   ros__parameters:
     trt_precision: fp16
-    build_only: false
     encoder_onnx_path: "$(var model_path)/pts_voxel_encoder_$(var model_name).onnx"
     encoder_engine_path: "$(var model_path)/pts_voxel_encoder_$(var model_name).engine"
     head_onnx_path: "$(var model_path)/pts_backbone_neck_head_$(var model_name).onnx"