Removed unused imports from data.py

backend/moonstream/data.py

@@ -1,12 +1,8 @@
 """
 Pydantic schemas for the Moonstream HTTP API
 """
-from enum import Enum
 from typing import List, Optional
 
-from sqlalchemy.sql.operators import notendswith_op
-
-
 from pydantic import BaseModel, Field