[$20] Remove footers on Challenge Listings page

[Oanh-and-only-Oanh]

Remove these links on the Challenge Listings page.

[PrakashDurlabhji]

@luizrrodrigues done in #5109

[luizrrodrigues]

Contest https://www.topcoder.com/challenges/30145862 has been created for this ticket.

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[luizrrodrigues]

Contest https://www.topcoder.com/challenges/30145862 has been updated - it has been assigned to PkDurlabhji.

This is an automated message for luizrrodrigues via Topcoder X