fix: pgvector dependency import

cognee/infrastructure/databases/vector/pgvector/PGVectorAdapter.py

@@ -1,5 +1,5 @@
 import asyncio
-from typing import List, Optional, Union, get_type_hints
+from typing import List, Optional, get_type_hints
 from sqlalchemy.inspection import inspect
 from sqlalchemy.orm import Mapped, mapped_column
 from sqlalchemy.dialects.postgresql import insert

cognee/infrastructure/databases/vector/pgvector/__init__.py

@@ -1,2 +1 @@
-from .PGVectorAdapter import PGVectorAdapter
 from .create_db_and_tables import create_db_and_tables