model card: drop direct-fetch snippet + Versioning section

README.md

@@ -142,26 +142,6 @@ By default all foundation models are stored in `$HOME/.cache/grace`; override wi
 **ASE** and **LAMMPS** — see the
 [GRACEmaker quickstart](https://github.com/ICAMS/grace-tensorpotential/blob/master/docs/quickstart.md).
 
-You can also fetch archives directly from this repo:
-
-```python
-from huggingface_hub import hf_hub_download
-path = hf_hub_download(
-    repo_id="AMS-ICAMS-RUB/grace-foundation-models",
-    filename="models/GRACE-2L-OMAT-large-base-model.tar.gz",
-    revision="kk",  # immutable tag; "main" is the moving tip
-)
-```
-
-### Versioning
-
-Revisions are pinned via immutable git tags so downloads are reproducible:
-
-- **`uq-v1`** — the initial set of UQ-augmented OMAT foundation models.
-- **`kk`** — model archives that additionally bundle the LAMMPS-Kokkos export (`kokkos.npz`).
-
-`main` always points at the latest revision.
-
 ---
 
 ## Fine-tuning foundation models