i cant load my os, grub first gave me errors, then i tried installing ubuntu to repair it which failed because it failed to execute some file related to grub, first grub was giving me an error of unknown filesystem after I formatted the kali partition then the grub resque commands i saw online didnt hep so i tired installing a new operating system which happened to be ubuntu. i want to remove the improperly installed ubuntu and revert my pc back to normal, so that it can boot into my first operating system which was mint. i tried boot-repair too, and it did not work, boot repair gave me this link to show to the person who was gonnna help me