So yesterday I ran Triangle Away [it worked] then used Odin to install stock firmware (to unroot). When the phone booted SuperUser was still installed with no way to remove.
I read on a forum to uninstall you must be rooted, so I rerooted using a different .tar.md5 file (I guess an updated version).
Now Triangle Away does not work, it skips "special bootmode" and reboots regularly. I have not installed any custom roms and want to go back 100% stock like the first day out of the box.
Do I need to use Triangle Away since I didn't install any custom roms? Also how do I remove superuser??