I'm using a publisher integration and I'm trying to add LTI links to the eBook using the publisher app that was added to my course. I can add the links to the eBook with no problem. However I want these to be content links. They are not assigned in the publisher platform and are worth no points. When I deploy the links to a module though, even though they are not "assigned" in the publisher platform, a gradebook column is created in the Canvas gradebook. How do I add links like this that are not graded without having them create a gradebook column in Canvas?