WooPack comes with an option to enable/disable showing related items suggestion on the Cart Page.
Here are the Steps to disable showing Related Items on the cart page-
Step 1: Launch the page builder of the Cart Page.
Step 2: Click on the Cart Module on the page or the little wrench icon at the corner of the module to open the Cart Module settings.
Step 3: In the Content Tab, look for the Show Cross-sells? option. Select No from the Drop Down and the Related Items section will be disabled. If you want to re-enable the same, just select Yes from the drop-down. When you are done, click save.
Here is an example of Cart without the Cross-Sell Section.
Here is what a Cart page would look like with the Cross-Sell Section.