no reason to save levels, we dont store anything in them anymore

src/c3nav/mapdata/render/data.py

@@ -8,7 +8,6 @@ from itertools import chain
 
 import numpy as np
 from django.conf import settings
-from django.db import transaction
 from scipy.interpolate import NearestNDInterpolator
 from shapely import prepared
 from shapely.geometry import GeometryCollection, LineString, MultiLineString
@@ -348,10 +347,6 @@ class LevelRenderData:
 
             map_history.save(MapHistory.level_filename(level.pk, 'composite'))
 
-        with transaction.atomic():
-            for level in levels:
-                level.save()
-
     cached = {}
     cache_key = None
     cache_lock = threading.Lock()