Github code search isn't great, but I was unable to find any usage of `uuid.getnode(getters=`, whereas I was able to find usage of `uuid.uuid1(node=` (even though `node` is optional and can be passed positionally). I'd be surprised if it was used in practice, given that it's undocumented and only present on 3.7+ (I discovered it while running `inspect.signature` on large parts of stdlib). I think that, and the fact that this never did anything (even before bpo-28009 it looks like `getters` gets immediately overwritten), mitigate the risk here.

Let me know what you think should be done; happy to submit a PR that issues a deprecation warning.