*** This bug is a duplicate of bug 1639374 ***
https://bugs.launchpad.net/bugs/1639374
>From the logs:
subprocess installed pre-removal script returned error exit status 10
** This bug has been marked a duplicate of bug 1639374
grub-pc fails to remove, rendering lubuntu uninstallable on
Do you have an EFI-System-Partition on your disk? To check this, type in
your terminal: sudo parted --list
** Changed in: grub-installer (Ubuntu)
Status: New => Incomplete
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