fix(tier4_perception_launch): fix error of tier4_perception_launch_param_path (tier4#1445)

Signed-off-by: Takagi, Isamu <isamu.takagi@tier4.jp>

Author: isamu-takagi

launch/tier4_perception_launch/launch/object_recognition/detection/pointcloud_map_filter.launch.py

@@ -150,9 +150,7 @@ def add_launch_arg(name: str, default_value=None):
     add_launch_arg("use_intra_process", "True")
     add_launch_arg("use_pointcloud_container", "False")
     add_launch_arg("container_name", "pointcloud_map_filter_pipeline_container")
-    add_launch_arg(
-        "tier4_perception_launch_param_path", None, "tier4_perception_launch parameter path"
-    )
+    add_launch_arg("tier4_perception_launch_param_path", "tier4_perception_launch parameter path")
     set_container_executable = SetLaunchConfiguration(
         "container_executable",
         "component_container",

launch/tier4_perception_launch/launch/obstacle_segmentation/ground_segmentation/ground_segmentation.launch.py

@@ -518,9 +518,7 @@ def add_launch_arg(name: str, default_value=None):
     add_launch_arg("use_intra_process", "True")
     add_launch_arg("use_pointcloud_container", "False")
     add_launch_arg("container_name", "perception_pipeline_container")
-    add_launch_arg(
-        "tier4_perception_launch_param_path", None, "tier4_perception_launch parameter path"
-    )
+    add_launch_arg("tier4_perception_launch_param_path", "tier4_perception_launch parameter path")
 
     set_container_executable = SetLaunchConfiguration(
         "container_executable",