Removed unused imports

ogn/collect/logbook.py

@@ -2,7 +2,7 @@ from celery.utils.log import get_task_logger
 
 from sqlalchemy import and_, or_, insert, update, between, exists
 from sqlalchemy.sql import func, null
-from sqlalchemy.sql.expression import true, false, label
+from sqlalchemy.sql.expression import true, false
 
 from ogn.collect.celery import app
 from ogn.model import TakeoffLanding, Logbook

ogn/model/logbook.py

@@ -1,4 +1,4 @@
-from sqlalchemy import Integer, DateTime, Interval, Column, ForeignKey, case, null
+from sqlalchemy import Integer, DateTime, Column, ForeignKey, case, null
 from sqlalchemy.orm import relationship
 
 from .base import Base