[$70] Hide "Ongoing challenges" bucket

[Oanh-and-only-Oanh]

Update:

Hide the "Ongoing challenges" bucket. See below

Effect: The user will still be able to see on going challenges in the listings page but it will be un "All Challenges".

[luizrrodrigues]

Contest https://www.topcoder.com/challenges/30144930 has been created for this ticket.

This is an automated message for luizrrodrigues via Topcoder X

[luizrrodrigues]

Contest https://www.topcoder.com/challenges/30144930 has been updated - it has been assigned to luizrrodrigues.

This is an automated message for luizrrodrigues via Topcoder X

[SathyaJayabal]

verified in staging