Remove namespace tags from from the node arguments to fix the namespa…

…ce issue described in ros-controls#127

Also remove superfluous ROS_ARGS_FLAG

gazebo_ros2_control/src/gazebo_ros2_control_plugin.cpp

@@ -204,24 +204,10 @@ void GazeboRosControlPlugin::Load(gazebo::physics::ModelPtr parent, sdf::Element
 
   if (sdf->HasElement("ros")) {
     sdf = sdf->GetElement("ros");
-
-    // Set namespace if tag is present
-    if (sdf->HasElement("namespace")) {
-      std::string ns = sdf->GetElement("namespace")->Get<std::string>();
-      // prevent exception: namespace must be absolute, it must lead with a '/'
-      if (ns.empty() || ns[0] != '/') {
-        ns = '/' + ns;
-      }
-      std::string ns_arg = std::string("__ns:=") + ns;
-      arguments.push_back(RCL_REMAP_FLAG);
-      arguments.push_back(ns_arg);
-    }
-
     // Get list of remapping rules from SDF
     if (sdf->HasElement("remapping")) {
       sdf::ElementPtr argument_sdf = sdf->GetElement("remapping");
 
-      arguments.push_back(RCL_ROS_ARGS_FLAG);
       while (argument_sdf) {
         std::string argument = argument_sdf->Get<std::string>();
         arguments.push_back(RCL_REMAP_FLAG);