Minor update for ISHLT Impexium import

app/models/core_object_models.py

@@ -1,11 +1,10 @@
-from __future__ import annotations
-import datetime, hashlib, logging, os, pytz, redis, secrets
+import datetime, pytz
 
 from typing import Dict, List, Optional, Set, Union
 from pydantic import BaseModel, EmailStr, Field, Json, PrivateAttr, ValidationError, validator
 
 from app.db_sql import redis_lookup_id_random
-from app.lib_general import *
+from app.lib_general import log, logging
 
 from app.common_field_schema import base_fields, default_num_bytes