You can display or hide the related listings from the item view within the Auctioneer settings. Click here to see how to access your Auctioneer settings.
This will show or hide the following section:
Once you are editing your auctioneer, go to the Main Settings tab and scroll down to the Bidding section. Here you will find a tickbox labelled Hide Related Items:
Once you have made any changes, click the green Save Auctioneer button at the top of the screen.