L2SS-218 Remove the old tango dir after the new one was pulled

bootstrap/sbin/rebuild_system_from_scratch.sh

@@ -38,12 +38,8 @@ function remove_images()
 function pull_tango()
 {
     git clone https://git.astron.nl/lofar2.0/tango.git ${HOME_DIR}
-}
-
-function stop_images()
-{
-    pushd ${HOME_DIR}/docker-compose && make stop
-    popd
+    # Now remove the old tango dir.
+    rm -rf ${OLD_HOME_DIR}
 }
 
 function clean_images()