Splited storage function from account.extra

* Splited storage function from account.extra -> tools/storage.py
  - OverwriteStorage
  - file_cleanup
* Updated account.models, archive.models
* Added OverwriteStorage and file_cleanup function to notice.models

1 files changed, 2 insertions, 5 deletions

diff --git a/archive/models.py b/archive/models.py
index 47903e4..467caa4 100644
--- a/archive/models.py
+++ b/archive/models.py
@@ -1,14 +1,11 @@
 # -*- coding: utf-8 -*-
 
 from django.db import models
+from django.db.models.signals import pre_delete
 from django.contrib.auth.models import User
-from django.contrib.contenttypes.models import ContentType
-from django.contrib.contenttypes import generic
 from django.utils.translation import ugettext_lazy as _
 
-from django.db.models.signals import pre_delete
-
-from account.extra import OverwriteStorage, file_cleanup
+from tools.storage import OverwriteStorage, file_cleanup
 
 
 class Archive(models.Model):