It seem this did the job: `apt-get purge grub-common` (it will include configurations files which `remove` will not).
And to remove unused dependencies (at least in my case):
`apt-get purge libfreetype6 libfuse2 libpng16-16 mokutil shim-helpers-amd64-signed shim-signed-common shim-unsigned`
System booted without problems.
Hope the next upgrade will run without problems.