clean: remove useless method

vector_store.py

@@ -15,7 +15,7 @@ from sqlalchemy.orm import Session
 
 from utils import str_to_list
 from models.distance import DistanceStrategy
-from model import Base, Article
+from model import Article
 
 DEFAULT_DISTANCE_STRATEGY = DistanceStrategy.COSINE
 
@@ -97,10 +97,6 @@ class CustomVectorStore(VectorStore):
     def embeddings(self) -> Embeddings:
         return self.embedding_function
 
-    def drop_tables(self) -> None:
-        with self._conn.begin():
-            Base.metadata.drop_all(self._conn)
-
     @contextlib.contextmanager
     def _make_session(self) -> Generator[Session, None, None]:
         """Create a context manager for the session, bind to _conn string."""