Removed the test launch file.

launch/spawn_test.launch

-<?xml version="1.0" encoding="UTF-8"?>
-<launch>
-  <arg name="road_name"  default="test2020"/>
-  <arg name="road_size"  default="14.392"/>
-  <arg name="road_path"  default="$(env HOME)/Downloads/"/>
-  <arg name="x"          default="0.0"/>
-  <arg name="y"          default="0.0"/>
-  <arg name="yaw"        default="0.0"/>
-  <arg name="parent"     default="map"/>
-
-  <include file="$(find iri_road_description)/launch/spawn_road.launch">
-    <arg name="road_name"  value="$(arg road_name)"/>
-    <arg name="road_size"  value="$(arg road_size)"/>
-    <arg name="road_path"  value="$(arg road_path)"/>
-    <arg name="x"          value="$(arg x)"/>
-    <arg name="y"          value="$(arg y)"/>
-    <arg name="yaw"        value="$(arg yaw)"/>
-    <arg name="parent"     value="$(arg parent)"/>
-  </include>
-
-  <node name="$(arg road_name)_rviz" pkg="rviz" type="rviz"
-        args="-d $(find iri_road_description)/rviz/road.rviz"/>
-</launch>
-