I do the same (though I have automated the process). I'm thinking of also undoing any votes just in case.
Edit+delete doesn't remove content when servers defederate each other, unfortunately. I suspect this can be fixed if you control the Lemmy server your account is hosted on, but I haven't bothered exploring that yet.
It's a Rust program I wrote that runs on my Lemmy server, but in theory it should work with any Lemmy server.
I've thrown the code and a compiled version of the binaries on Github if you're interested: source / binary downloads