When Wikidata started we added the link to the related Wikidata Item to the toolbox section of the sidebar of the article. Later the In Other Projects Sidebar was developed to show links to all the other Wikimedia projects based on Wikidata's sitelinks. However it does not include a link to Wikidata. We didn't want to duplicate the link. Since the In Other Projects Sidebar wasn't enabled everywhere we didn't want to remove it from the toolbox section either.
Now the In Other Projects Sidebar is enabled on all Wikimedia projects. We should move the Wikidata Item link to the In Other Projects section.
GIVEN a Wikipedia article
WHEN it is connected to a Wikidata Item
THEN link to the Wikidata Item is added to the In Other Projects section
AND link to the Wikidata Item is **not** added to the Toolbox section