A non-UEFI computer I use for experimental install purposes only has two Ubuntu installations set up as dual boot. Currently they are 18.04 LTS and 19.04.
Not knowing any better, I installed GRUB with both installations, and now they can get into a "duelling GRUB" situation with the last one to run
grub-install grabbing control.
How can I delete GRUB from one of the installations?
I am leaning towards re-installing the 19.04 system without GRUB, but would take an easier way if it exists.