fix: remove old announcement from papers

Author: NimVrod

papers/models.py

@@ -272,12 +272,6 @@ def __str__(self):
         return f'[{self.author}] - {self.paper}'
 
 
-class Announcement(models.Model):
-    text = models.TextField()
-    created_at = models.DateTimeField(default=timezone.now)
-
-    def __str__(self):
-        return textwrap.shorten(self.text, width=20)
 
 
 class Message(models.Model):