In this case you can remove sdbootutil-dracut-measure-pcr package. The message comes from the service checking that the root filesystem has not been replaced.
That is actually incorrect. grub just forwards LUKS key to the initrd; device is still unlocked by user space. So this service may be used with grub as well.
Thank you,
you are right, my installations are not grub based. I was confused, because both have a grub configuration in /etc, which I expected only to exist on grub based installations.