new backup format - not available in 3.0

Hi,

I am using Moodle 3.0. running with Apache 2.4.9 and PHP 5.5.12 to back-up a course of size greater than 2 GB . I got a progress count error. while referring to the same in moodle.org i found out such backups could be made through an experimental settings. Although, i see no options such as "Enable new backup format" under admin -> development -> experiment -> experimental settings.(as per https://docs.moodle.org/27/en/Backup_and_restore_FAQ )

Please explain to me whether the setting has been totally removed from moodle 3.0. or is missing ?