Move normalize.py to utils of alchemical_model

docs/src/dev-docs/utils/index.rst

@@ -18,6 +18,5 @@ This is the API for the ``utils`` module of ``metatensor-models``.
    merge_capabilities
    model-io
    neighbors_lists
-   normalize
    omegaconf
    output_gradient

src/metatensor/models/experimental/alchemical_model/model.py

@@ -18,8 +18,8 @@
 
 from ... import ARCHITECTURE_CONFIG_PATH
 from ...utils.composition import apply_composition_contribution
-from ...utils.normalize import apply_normalization
 from .utils import systems_to_torch_spex_dict
+from .utils.normalize import apply_normalization
 
 
 DEFAULT_HYPERS = OmegaConf.to_container(

src/metatensor/models/experimental/alchemical_model/train.py

@@ -22,11 +22,11 @@
 from ...utils.merge_capabilities import merge_capabilities
 from ...utils.model_io import load_checkpoint, save_model
 from ...utils.neighbors_lists import get_system_with_neighbors_lists
-from ...utils.normalize import (
+from .model import DEFAULT_HYPERS, Model
+from .utils.normalize import (
     get_average_number_of_atoms,
     get_average_number_of_neighbors,
 )
-from .model import DEFAULT_HYPERS, Model
 
 
 logger = logging.getLogger(__name__)