I have have installed Windows 10,Ubuntu 20.04 and Fedora 33 in this order as a triple boot on my (HP Notebook 15-da0435tx) and now i want to uninstall fedora while still keeping Ubuntu and Windows untouched ? How would I do this I'm unable to find good guides on uninstalling a linux distro in a triple boot? The Ubuntu partition is ext4 and Fedora's is brtfs.
Boot from a live USB then remove the Fedora partition.
To ensure that grub is correctly installed, reinstall it as described in the Ubuntu Help: via the LiveCD terminal.