code: def delete(self):
      index_path = Path(self._index_path)
      if index_path.exists():
          index_path.unlink()
  
file_path: evadb/evadb/third_party/vector_stores/faiss.py
imports: import os
  from pathlib import Path
  from typing import List
  import numpy
  from evadb.third_party.vector_stores.types import FeaturePayload, VectorIndexQuery, VectorIndexQueryResult, VectorStore
  from evadb.utils.generic_utils import try_to_import_faiss
label_desc: Use image node_id 6 for calling the FaissVectorStore obj's underlying member method code with example usage: obj.delete() without return types