delete notification again, if article is unpublished

src/model/notification.rs

@@ -179,6 +179,13 @@ ORDER BY read_at DESC, created_at DESC;
         .await
         .unwrap();
     }
+
+    pub(crate) async fn delete_by_link(db: &sqlx::Pool<Sqlite>, link: &str) {
+        sqlx::query!("DELETE FROM notification WHERE link=?", link)
+            .execute(db)
+            .await
+            .unwrap();
+    }
 }
 
 #[cfg(test)]