Deleted Simulation/launch/turtlebot3_stage_1.launch,...

Deleted Simulation/launch/turtlebot3_stage_1.launch, Simulation/launch/turtlebot3_stage_2.launch, Simulation/launch/turtlebot3_stage_3.launch, Simulation/launch/turtlebot3_stage_4.launch files

Simulation/launch/turtlebot3_stage_1.launch

-<launch>
-  <arg name="model" default="$(env TURTLEBOT3_MODEL)" doc="model type [burger, waffle, waffle_pi]"/>
-  <arg name="x_pos" default="0.0"/>
-  <arg name="y_pos" default="0.0"/>
-  <arg name="z_pos" default="0.0"/>
-
-  <include file="$(find gazebo_ros)/launch/empty_world.launch">
-    <arg name="world_name" value="$(find turtlebot3_gazebo)/worlds/turtlebot3_stage_1.world"/>
-    <arg name="paused" value="false"/>
-    <arg name="use_sim_time" value="0.1"/>
-    <arg name="gui" value="true"/>
-    <arg name="headless" value="false"/>
-    <arg name="debug" value="false"/>
-  </include>  
-
-
-  <param name="robot_description" command="$(find xacro)/xacro.py $(find turtlebot3_description)/urdf/turtlebot3_$(arg model).urdf.xacro" />
-
-  <node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-urdf -model turtlebot3_burger -x $(arg x_pos) -y $(arg y_pos) -z $(arg z_pos) -param robot_description" />
-
-</launch>

Simulation/launch/turtlebot3_stage_2.launch

-<launch>
-  <arg name="model" default="$(env TURTLEBOT3_MODEL)" doc="model type [burger, waffle, waffle_pi]"/>
-  <arg name="x_pos" default="0.0"/>
-  <arg name="y_pos" default="0.0"/>
-  <arg name="z_pos" default="0.0"/>
-
-  <include file="$(find gazebo_ros)/launch/empty_world.launch">
-    <arg name="world_name" value="$(find turtlebot3_gazebo)/worlds/turtlebot3_stage_2.world"/>
-    <arg name="paused" value="false"/>
-    <arg name="use_sim_time" value="true"/>
-    <arg name="gui" value="true"/>
-    <arg name="headless" value="false"/>
-    <arg name="debug" value="false"/>
-  </include>  
-
-
-  <param name="robot_description" command="$(find xacro)/xacro.py $(find turtlebot3_description)/urdf/turtlebot3_$(arg model).urdf.xacro" />
-
-  <node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-urdf -model turtlebot3_burger -x $(arg x_pos) -y $(arg y_pos) -z $(arg z_pos) -param robot_description" />
-</launch>

Simulation/launch/turtlebot3_stage_3.launch

-<launch>
-  <arg name="model" default="$(env TURTLEBOT3_MODEL)" doc="model type [burger, waffle, waffle_pi]"/>
-  <arg name="x_pos" default="0.0"/>
-  <arg name="y_pos" default="0.0"/>
-  <arg name="z_pos" default="0.0"/>
-
-  <include file="$(find gazebo_ros)/launch/empty_world.launch">
-    <arg name="world_name" value="$(find turtlebot3_gazebo)/worlds/turtlebot3_stage_3.world"/>
-    <arg name="paused" value="false"/>
-    <arg name="use_sim_time" value="true"/>
-    <arg name="gui" value="true"/>
-    <arg name="headless" value="false"/>
-    <arg name="debug" value="false"/>
-  </include>  
-
-  <param name="robot_description" command="$(find xacro)/xacro.py $(find turtlebot3_description)/urdf/turtlebot3_$(arg model).urdf.xacro" />
-
-  <node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-urdf -model turtlebot3_burger -x $(arg x_pos) -y $(arg y_pos) -z $(arg z_pos) -param robot_description" />
-
-</launch>

Simulation/launch/turtlebot3_stage_4.launch

-<launch>
-  <arg name="model" default="$(env TURTLEBOT3_MODEL)" doc="model type [burger, waffle, waffle_pi]"/>
-  <arg name="x_pos" default="-0.7"/>
-  <arg name="y_pos" default="0.0"/>
-  <arg name="z_pos" default="0.0"/>
-
-  <include file="$(find gazebo_ros)/launch/empty_world.launch">
-    <arg name="world_name" value="$(find turtlebot3_gazebo)/worlds/turtlebot3_stage_4.world"/>
-    <arg name="paused" value="false"/>
-    <arg name="use_sim_time" value="true"/>
-    <arg name="gui" value="true"/>
-    <arg name="headless" value="false"/>
-    <arg name="debug" value="false"/>
-  </include>  
-
-
-  <param name="robot_description" command="$(find xacro)/xacro.py $(find turtlebot3_description)/urdf/turtlebot3_$(arg model).urdf.xacro" />
-
-  <node name="spawn_urdf" pkg="gazebo_ros" type="spawn_model" args="-urdf -model turtlebot3_burger -x $(arg x_pos) -y $(arg y_pos) -z $(arg z_pos) -param robot_description" />
-
-</launch>