remove gazebo launch files

launch/cell-controllers/gazebo-cell_ads-table.launch

-<launch>
-
-    <arg name="connection_address" default="tcp://*:6576"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="ads_cell" output="screen">
-        <param name="connection_address" type="string" value="$(arg connection_address)"/>
-        <param name="scene" type="string" value="$(find ccf_immersive_sorting)/config/config_scene_ads-table.json"/>
-    </node>
-
-</launch>

launch/cell-controllers/gazebo-cell_ceti-table-1-placeworld.launch

-<launch>
-
-    <!-- MQTT server for communication with client cells -->
-    <arg name="mqtt_server" default="tcp://localhost:1883"
-         doc="address of the mqtt server for the connection to the controller"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="ceti_cell_placeworld" output="screen">
-        <param name="arm" type="string" value="arm1"/>
-        <param name="other_cell" type="string" value="/ceti_cell_2_placeworld/scene/update"/>
-        <param name="mqtt_server" type="yaml" value="$(arg mqtt_server)"/>
-        <param name="scene" type="string"
-               value="$(find ccf_immersive_sorting)/config/config_scene_ceti-table-placeworld.json"/>
-    </node>
-
-</launch>

launch/cell-controllers/gazebo-cell_ceti-table-1.launch

-<launch>
-
-    <arg name="connection_address" default="tcp://*:6576"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="ceti_cell_1" output="screen">
-        <param name="connection_address" type="string" value="$(arg connection_address)"/>
-        <param name="scene" type="string" value="$(find ccf_immersive_sorting)/config/config_scene_ceti-table-1.json"/>
-    </node>
-
-</launch>

launch/cell-controllers/gazebo-cell_ceti-table-2-placeworld.launch

-<launch>
-
-    <!-- MQTT server for communication with client cells -->
-    <arg name="mqtt_server" default="tcp://192.168.0.122:1883"
-         doc="address of the mqtt server for the connection to the controller"/>
-
-    <!-- robot IP used by the robot controller -->
-    <arg name="robot_ip" default="172.31.1.13" doc="ip address if the robot"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <param name="/connector_node_ros_ccf/topics/command" value="/ceti_cell_placeworld/command"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="ceti_cell_2_placeworld" output="screen">
-        <param name="arm" type="string" value="arm2"/>
-        <param name="other_cell" type="string" value="/ceti_cell_placeworld/scene/update"/>
-        <param name="mqtt_server" type="yaml" value="$(arg mqtt_server)"/>
-        <param name="scene" type="string"
-               value="$(find ccf_immersive_sorting)/config/config_scene_ceti-table-placeworld.json"/>
-    </node>
-
-</launch>

launch/cell-controllers/gazebo-cell_ceti-table-2.launch

-<launch>
-
-    <arg name="connection_address" default="tcp://*:6576"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="ceti_cell_2" output="screen">
-        <param name="connection_address" type="string" value="$(arg connection_address)"/>
-        <param name="scene" type="string" value="$(find ccf_immersive_sorting)/config/config_scene_ceti-table-2.json"/>
-    </node>
-
-</launch>

launch/cell-controllers/gazebo-cell_st-table.launch

-<launch>
-
-    <arg name="connection_address" default="tcp://*:6576"/>
-
-    <include file="$(find ccf)/launch/simulation_setup.launch"/>
-
-    <node pkg="ccf_immersive_sorting" type="moveit_sorting_controller" name="st_cell" output="screen">
-        <param name="connection_address" type="string" value="$(arg connection_address)"/>
-        <param name="scene" type="string" value="$(find ccf_immersive_sorting)/config/config_scene_st-table.json"/>
-    </node>
-
-</launch>