delete https://api.ottolearn.io/v1/rest/leaderboard()/contest()/contents()
Remove an existing content of an existing Leaderboard Contest. Leaderboard Contest ID's can be found by using the List all Leaderboard Contest (/leaderboard({id}})/contest) API call. Content ID's can be found by using the List contents of a specific Leaderboard Contest (/leaderboard({id}})/contest({id}})/contents) API call.