Removed unused field from ListSensor.

wlokalu/api/models.py

@@ -29,7 +29,6 @@ class Sensor(models.Model):
 class ListSensor(models.Model):
   # sensor_id is an artificial key composed of name and subname
   sensor_id = models.CharField(max_length = 512, primary_key = True)
-  state = models.CharField(max_length = 256)
   since = models.DateTimeField(auto_now_add = True)
 
   @property