While sitelinks are used to help users navigate content efficiently, sometimes Google's algorithms may display pages that you may not want showing.

You won't be able to remove a link entirely from sitelinks, but you will be able to demote a link so that it's less likely to show. This can be done directly in Google Webmaster's Search Console.

1. On the Search Console home page, select the site you want to edit the links for
2. Click 'Search Appearance' to expand this, and then click 'Sitelinks'.
3. In the 'For this search result' box, complete the URL for the page you don't wish to display a sitelink
4. In the 'Demote this sitelink URL' box, complete the URL you wish to demote

You will need to repeat steps 3 and 4 for each search result and page you wish to demote. Once a link is demoted, it will take some time for this to be reflected in search results.