Merge pull request #99 from dstansby/rm-disclaimer

Remove out of date disclaimer

Author: dstansby

docs/usage_zarr_v3.md

@@ -1,13 +1,5 @@
 # Usage (Zarr V3)
 
-## Disclaimer
-
-At the moment, [Zarr version 3](https://zarr-specs.readthedocs.io/en/latest/v3/core/v3.0.html) is only _barely_ supported by this project. That will likely
-change when the Zarr storage backend used here ([`zarr-python`](https://zarr.readthedocs.io/en/stable/))
-fully implements version 3. Until then, the only Zarr v3 stuff you can do with this repo
-is create abstract hierarchies. You cannot use the `to_zarr` or `from_zarr` methods, because
-the backend for that doesn't exist.
-
 ## Defining Zarr v3 hierarchies
 
 ```python