I'm getting this error since trying to upgrade to Ubuntu 20. For the reference, I never wanted to install ZFS on this computer, never did anything to that effect, and, subsequently, there are no ZFS volumes / pools or anything like that on this computer.
Why is this happening / how can I disable this behavior? I don't have a kernel module for ZFS, so there's nothing to blacklist.
I figured that the effects of whatever kernel is doing there might be benign, I still don't want it to spew suspicious errors.