ROS: drop ROS 1

Author: nim65s

package.xml

@@ -14,8 +14,6 @@
   <build_depend>doxygen</build_depend>
 
   <!-- The following tag is recommended by REP-136 -->
-  <exec_depend condition="$ROS_VERSION == 1">catkin</exec_depend>
-
   <depend condition="$ROS_PYTHON_VERSION == 3">python3</depend>
   <depend condition="$ROS_PYTHON_VERSION == 3">python3-numpy</depend>
   <depend condition="$ROS_PYTHON_VERSION == 3">python3-scipy</depend>