removed old launch file.

ur_driver/test.launch

-<launch>
-  <include file="$(find ur5_base)/launch/load.launch" />
-  <node name="robot_state_publisher" pkg="robot_state_publisher" type="state_publisher" />
-  <node name="rviz" pkg="rviz" type="rviz" args="-d $(find urdf_tutorial)/urdf.vcg" />
-
-</launch>