don't lock all mapupates during AltitudeArea.recalculate()
@@ -439,8 +439,6 @@ class AltitudeArea(LevelGeometryMixin, models.Model):
level_areas[level] = set(area.tmpid for area in level_areas.get(level, []))
# save to database
- from c3nav.mapdata.models import MapUpdate
- with MapUpdate.lock():
areas_to_save = set(range(len(areas)))
all_candidates = AltitudeArea.objects.select_related('level')
