old_contents: AUTO_SCROLL_TO_ERROR = "auto_scroll_to_error"
  XML_CATALOG_FILES = "xml_catalog_files"
  PY3_SITE_PACKAGES = "python3_site_packages"
  
new_contents: AUTO_SCROLL_TO_ERROR = "auto_scroll_to_error"
  XML_CATALOG_FILES = "xml_catalog_files"
  
subject: Remove obsolete constant