WordPress Version: 5.9
/**
* Unregister a setting
*
* @since 2.7.0
* @deprecated 3.0.0 Use unregister_setting()
* @see unregister_setting()
*
* @param string $option_group The settings group name used during registration.
* @param string $option_name The name of the option to unregister.
* @param callable $sanitize_callback Optional. Deprecated.
*/
function remove_option_update_handler($option_group, $option_name, $sanitize_callback = '')
{
_deprecated_function(__FUNCTION__, '3.0.0', 'unregister_setting()');
unregister_setting($option_group, $option_name, $sanitize_callback);
}