Drop legacy Zarr attribute fallback

Author: trissim

src/polystore/zarr.py

@@ -23,28 +23,17 @@
 
 logger = logging.getLogger(__name__)
 
-# Zarr attribute keys (polystore prefix) with optional legacy fallback prefixes
+# Zarr attribute keys (polystore prefix only)
 _ATTR_PREFIX = "polystore"
-_LEGACY_ATTR_PREFIXES = [
-    prefix.strip()
-    for prefix in os.getenv("POLYSTORE_LEGACY_ATTR_PREFIXES", "").split(",")
-    if prefix.strip()
-]
 ATTR_FILENAME_MAP = f"{_ATTR_PREFIX}_filename_map"
 ATTR_OUTPUT_PATHS = f"{_ATTR_PREFIX}_output_paths"
 ATTR_DIMENSIONS = f"{_ATTR_PREFIX}_dimensions"
-LEGACY_ATTR_FILENAME_MAPS = [f"{prefix}_filename_map" for prefix in _LEGACY_ATTR_PREFIXES]
-LEGACY_ATTR_OUTPUT_PATHS = [f"{prefix}_output_paths" for prefix in _LEGACY_ATTR_PREFIXES]
-LEGACY_ATTR_DIMENSIONS = [f"{prefix}_dimensions" for prefix in _LEGACY_ATTR_PREFIXES]
 DEFAULT_PLATE_NAME = os.getenv("POLYSTORE_PLATE_NAME", "Polystore_Plate")
 
 
-def _get_attr(attrs: Dict[str, Any], key: str, legacy_keys: List[str]):
+def _get_attr(attrs: Dict[str, Any], key: str):
     if key in attrs:
         return attrs[key]
-    for legacy_key in legacy_keys:
-        if legacy_key in attrs:
-            return attrs[legacy_key]
     return None
 
 
@@ -397,9 +386,7 @@ def load_batch(self, file_paths: List[Union[str, Path]], **kwargs) -> List[Any]:
                             field_group = well_group["0"]
                             if "0" in field_group.array_keys():
                                 field_array = field_group["0"]
-                                filename_map_attr = _get_attr(
-                                    field_array.attrs, ATTR_FILENAME_MAP, LEGACY_ATTR_FILENAME_MAPS
-                                )
+                                filename_map_attr = _get_attr(field_array.attrs, ATTR_FILENAME_MAP)
                                 if filename_map_attr is not None:
                                     filename_map = dict(filename_map_attr)
 
@@ -807,9 +794,7 @@ def _matches_filters(name: str) -> bool:
                                     field_group = well_group["0"]
                                     if "0" in field_group.array_keys():
                                         field_array = field_group["0"]
-                                        output_paths_attr = _get_attr(
-                                            field_array.attrs, ATTR_OUTPUT_PATHS, LEGACY_ATTR_OUTPUT_PATHS
-                                        )
+                                        output_paths_attr = _get_attr(field_array.attrs, ATTR_OUTPUT_PATHS)
                                         if output_paths_attr is not None:
                                             output_paths = output_paths_attr
                                             for filename in output_paths: