As configured, you have an unusual way to boot Linux. You have testdisk or a Window like boot loader that just chains to the boot flagged partition. Then grub2 is in the partition boot sector (PBR) to boot.
Normally grub2 is not installed to a partition boot sector as it has to convert to blocklists or hard coded addresses. On major updates grub's files may get relocated on drive and then you would have to reinstall grub to the PBR. Normally grub2's boot loader is installed to the MBR of the drive.
Unless you want the older version of Ubuntu in the "recovery" partition, there is not much reason to save it. You can download newer versions and have a boot/repairCD or USB instead of the partition.