Comment 3 for bug 1938920

> Anyway, maybe just removing the deprecation notice as a delta for focal/hirsute could be an option?

Yes - this is what I meant. The concept of "deprecation" is only related to what promises we're making to users about the future, so there aren't any code changes needed, just documentation changes. But if we're agreed that we're not ever going to remove support for the old method in Focal, then we shouldn't start telling users on Focal that support is going away because that could be alarming if they interpret that to think that their configuration will break on Focal in the future. So it would be easiest to just not print deprecation notices in backports.