removed default IPs in dual example control launch

franka_control/launch/franka_combined_control.launch

@@ -17,7 +17,7 @@
 
   <!-- Optional arg to manually configure the ips of all robots, overwriting ips that are configured in hw_config_file -->
   <!-- The ips must be set as dictionary like {<arm_id_1>/robot_ip: <my_ip_1>, <arm_id_2>/robot_ip: <my_ip_2>} -->
-  <arg name="robot_ips" />
+  <arg name="robot_ips"  default="{}"/>
 
   <!-- The config file containing the parameterization for all controllers to start with this launch file -->
   <arg name="controllers_file" default="$(find franka_control)/config/default_combined_controllers.yaml" />

franka_example_controllers/launch/dual_arm_cartesian_impedance_example_controller.launch

 <?xml version="1.0" ?>
 <launch>
+  <!--Be sure to pass the IPs of your pandas like robot_ips:={panda_1/robot_ip: <my_ip_1>, panda_2/robot_ip: <my_ip_2>}   -->
+  <arg name="robot_ips" />
+
   <arg name="robot_id" default="panda_dual" />
-  <arg name="robot_ips" default="{panda_1/robot_ip: robot_1, panda_2/robot_ip: robot_2}" />
   <arg name="rviz" default="true" />
   <arg name="rqt" default="true" />