code: def _remove_deprecated_options(self, old_version):
          
          old_defaults = self._load_old_defaults(old_version)
          for section in old_defaults.sections():
              for option, _ in old_defaults.items(section, raw=self.raw):
                  if self.get_default(section, option) is NoDefault:
                      try:
                          self.remove_option(section, option)
                          if len(self.items(section, raw=self.raw)) == 0:
                              self.remove_section(section)
                      except cp.NoSectionError:
                          self.remove_section(section)
docs: Remove options which are present in the .ini file but not in defaults