Remove useless code in FirewallState and get_trust_score.

backend/device_registry/models.py

@@ -786,12 +786,6 @@ def connections_form_data(self):
 
 
 class FirewallState(models.Model):
-    POLICY_ENABLED_ALLOW = 1
-    POLICY_ENABLED_BLOCK = 2
-    POLICY_CHOICES = (
-        (POLICY_ENABLED_ALLOW, 'Allow by default'),
-        (POLICY_ENABLED_BLOCK, 'Block by default')
-    )
     device = models.OneToOneField(Device, on_delete=models.CASCADE)
     scan_date = models.DateTimeField(null=True, auto_now_add=True)
     rules = JSONField(blank=True, default=dict)

backend/device_registry/recommended_actions.py

@@ -475,7 +475,7 @@ def _affected_devices(cls, qs):
 
     @classmethod
     def _is_affected(cls, device) -> bool:
-        from .models import FirewallState, GlobalPolicy
+        from .models import GlobalPolicy
         firewallstate = getattr(device, 'firewallstate', None)
         return firewallstate is not None \
             and (firewallstate.global_policy is None