There are 3 different classes that are deprecated under the streams-scala submodule:
As far as I can tell, none of them are in use internally and could be removed for release 3.0.0
Does this change require a KIP?
Update, only classes/methods deprecaded since at least 2.5 can be removed. This means `Serdes` needs to stay till 4.0. I'll create tickets for methods/classes that are deprecated, but not long enough.