code: def unset(self, section, option):
          
          with self._lock:
              if not self._config.has_section(section):
                  return
              if self._config.has_option(section, option):
                  self._config.remove_option(section, option)
                  self._dirty = True
              if not self._config.options(section):
                  self._config.remove_section(section)
                  self._dirty = True
docs: Remove option from section.