Well, with newest snapd 2.11 version there is a way to remove ubuntu-core snap package.
If you try: $sudo snap remove ubuntu-core
You get the "snap "ubuntu-core" is not removable" error as expected.
But you can disable it with the command: $sudo snap disable ubuntu-core
And, once disabled, it can be effectively removed using again: $sudo snap remove ubuntu-core
Well, with newest snapd 2.11 version there is a way to remove ubuntu-core snap package.
If you try:
$sudo snap remove ubuntu-core
You get the "snap "ubuntu-core" is not removable" error as expected.
But you can disable it with the command:
$sudo snap disable ubuntu-core
And, once disabled, it can be effectively removed using again:
$sudo snap remove ubuntu-core