Bug 24126: Article requests tab appears twice on patron's checkout screen

Bug 24126: Article requests tab appears twice on patron's checkout screen

This patch removes duplicated markup on the checkout page which results
in the "Article requests" tab appearing twice.

To test, apply the patch and enable ArticleRequests.

Check out to a patron. In the set of tabs that includes checkouts,
holds, restrictions, etc., the "Article requests" tab should appear only
once.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>