Change notification backend

judge/models/comment.py

@@ -177,29 +177,3 @@ class CommentLock(models.Model):
 
     def __str__(self):
         return str(self.page)
-
-
-class Notification(models.Model):
-    owner = models.ForeignKey(
-        Profile,
-        verbose_name=_("owner"),
-        related_name="notifications",
-        on_delete=CASCADE,
-    )
-    time = models.DateTimeField(verbose_name=_("posted time"), auto_now_add=True)
-    comment = models.ForeignKey(
-        Comment, null=True, verbose_name=_("comment"), on_delete=CASCADE
-    )
-    read = models.BooleanField(verbose_name=_("read"), default=False)
-    category = models.CharField(verbose_name=_("category"), max_length=1000)
-    html_link = models.TextField(
-        default="",
-        verbose_name=_("html link to comments, used for non-comments"),
-        max_length=1000,
-    )
-    author = models.ForeignKey(
-        Profile,
-        null=True,
-        verbose_name=_("who trigger, used for non-comment"),
-        on_delete=CASCADE,
-    )