Remove urls from leaderboard

src/leaderboard_formatting.py

@@ -38,5 +38,5 @@ def get_columns_per_task(task_id: str) -> List[str]:
     return (
         ["Model Name", "Availability", "Context Size"]
         + metrics_per_task
-        + ["Submitted By", "URLs"]
+        + ["Submitted By"]
     )