Reduce complexity of "noindex-category-desc"

Spotted by Lokal Profil and reported at
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Noindex-category-desc/sv

Change-Id: Ie088085cc6aa1974c93a1687ecc67ed961413c6f
Merge "Reduce complexity of "noindex-category-desc""