remove donau linz stuff

src/model/notification.rs

@@ -89,6 +89,20 @@ impl Notification {
         tx.commit().await.unwrap();
     }
 
+    pub async fn create_for_all(
+        db: &SqlitePool,
+        message: &str,
+        category: &str,
+        link: Option<&str>,
+        action_after_reading: Option<&str>,
+    ) {
+        let users = User::all(db).await;
+
+        for user in users {
+            Self::create(db, &user, message, category, link, action_after_reading).await;
+        }
+    }
+
     pub async fn create_for_steering_people_tx(
         db: &mut Transaction<'_, Sqlite>,
         message: &str,