refactor: nits

packages/leann-backend-hnsw/leann_backend_hnsw/hnsw_backend.py

@@ -1,6 +1,5 @@
 import numpy as np
 import os
-import json
 from pathlib import Path
 from typing import Dict, Any, List, Literal
 import pickle
@@ -18,7 +17,7 @@ from leann.interface import (
 
 
 def get_metric_map():
-    from . import faiss
+    from . import faiss  # type: ignore
 
     return {
         "mips": faiss.METRIC_INNER_PRODUCT,
@@ -49,7 +48,7 @@ class HNSWBuilder(LeannBackendBuilderInterface):
         self.dimensions = self.build_params.get("dimensions")
 
     def build(self, data: np.ndarray, ids: List[str], index_path: str, **kwargs):
-        from . import faiss
+        from . import faiss  # type: ignore
 
         path = Path(index_path)
         index_dir = path.parent
@@ -117,7 +116,7 @@ class HNSWSearcher(BaseSearcher):
             backend_module_name="leann_backend_hnsw.hnsw_embedding_server",
             **kwargs,
         )
-        from . import faiss
+        from . import faiss  # type: ignore
 
         self.distance_metric = self.meta.get("distance_metric", "mips").lower()
         metric_enum = get_metric_map().get(self.distance_metric)