[Update] 删除user group继承的抽象类

apps/users/models/group.py

@@ -4,12 +4,10 @@ import uuid
 from django.db import models, IntegrityError
 from django.utils.translation import ugettext_lazy as _
 
-from common.mixins import NoDeleteModelMixin
-
 __all__ = ['UserGroup']
 
 
-class UserGroup(NoDeleteModelMixin):
+class UserGroup(models.Model):
     id = models.UUIDField(default=uuid.uuid4, primary_key=True)
     name = models.CharField(max_length=128, unique=True, verbose_name=_('Name'))
     comment = models.TextField(blank=True, verbose_name=_('Comment'))