cleanup migrations

Signed-off-by: Nico Schottelius <nico@nico-notebook.schottelius.org>

uncloud_vm/models.py

@@ -1,5 +1,3 @@
-import uuid
-
 from django.db import models
 from django.contrib.auth import get_user_model
 
@@ -10,13 +8,9 @@ import uncloud_pay.models as pay_models
 import uncloud_storage.models
 
 class VMCluster(UncloudModel):
-    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     name = models.CharField(max_length=128, unique=True)
 
-
 class VMHost(UncloudModel):
-    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-
     # 253 is the maximum DNS name length
     hostname = models.CharField(max_length=253, unique=True)
 
@@ -132,7 +126,7 @@ class VMDiskImageProduct(UncloudModel):
     )
 
     def __str__(self):
-        return "VMDiskImage {} ({}): {} gb".format(self.uuid,
+        return "VMDiskImage {} ({}): {} gb".format(self.id,
                                                    self.name,
                                                    self.size_in_gb)