remove unused imports

freqtrade/main.py

@@ -5,7 +5,7 @@ import logging
 import time
 import traceback
 from datetime import datetime
-from typing import Dict, Optional, List
+from typing import Dict, Optional
 
 from jsonschema import validate
 

freqtrade/persistence.py

@@ -5,7 +5,6 @@ from sqlalchemy import Boolean, Column, DateTime, Float, Integer, String, create
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm.scoping import scoped_session
 from sqlalchemy.orm.session import sessionmaker
-from sqlalchemy.types import Enum
 
 from freqtrade import exchange