Now that the lower bound of `zarr` is 3.0.0, the [checks / guards against zarr being 2.x](https://github.com/search?q=repo%3Apydata%2Fxarray+%22has_zarr_v3%22&type=code) are dead and can be removed.
Now that the lower bound of
zarris 3.0.0, the checks / guards against zarr being 2.x are dead and can be removed.