Update build_ros2.sh

Author: mmmarinho

.devel/build_ros2.sh

@@ -97,7 +97,7 @@ cd $TMP_DIR
 echo "
 #!/bin/bash
 rm -r $TMP_DIR
-" >> "~/sas_ws/src/sas/.devel/remove_tmp_folder.sh"
+" > "~/sas_ws/src/sas/.devel/remove_tmp_folder.sh"
 
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 #                        Clone all packages