vm: remove 'destroyed' property from network interfaces

circle/vm/models/network.py

@@ -58,10 +58,6 @@ class Interface(Model):
         return 'cloud-' + str(self.instance.id) + '-' + str(self.vlan.vid)
 
     @property
-    def destroyed(self):
-        return self.instance.destroyed_at
-
-    @property
     def mac(self):
         try:
             return self.host.mac
@@ -138,33 +134,16 @@ class Interface(Model):
         return iface
 
     def deploy(self):
-        if self.destroyed:
-            from .instance import Instance
-            raise Instance.InstanceDestroyedError(self.instance,
-                                                  "The associated instance "
-                                                  "(%s) has already been "
-                                                  "destroyed" % self.instance)
-
         net_tasks.create.apply_async(
             args=[self.get_vmnetwork_desc()],
             queue=self.instance.get_remote_queue_name('net'))
 
     def shutdown(self):
-        if self.destroyed:
-            from .instance import Instance
-            raise Instance.InstanceDestroyedError(self.instance,
-                                                  "The associated instance "
-                                                  "(%s) has already been "
-                                                  "destroyed" % self.instance)
-
         queue_name = self.instance.get_remote_queue_name('net')
         net_tasks.destroy.apply_async(args=[self.get_vmnetwork_desc()],
                                       queue=queue_name)
 
     def destroy(self):
-        if self.destroyed:
-            return
-
         self.shutdown()
         if self.host is not None:
             self.host.delete()