removed line in CMakeLists.txt that tries to remove CMakeFiles

folder because it breaks the make clean command

CMakeLists.txt

@@ -294,7 +294,6 @@ add_subdirectory(scripts)
 add_subdirectory(deployment)
 set(FILES_TO_BE_REMOVED ${CMAKE_SOURCE_DIR}/stage tests)
 add_subdirectory(tools)
-set(FILES_TO_BE_REMOVED CMakeFiles stage tests)
 set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES
                              "${FILES_TO_BE_REMOVED}")