Before you get too far: At the risk of my missing something, those folders in Lightroom are pointing to Applications resident folders. They do not contain images. If they do, they should not. Nor should they be in Lightroom's catalog.
Using Finder, go to Applications and see what's in those folders. Mine contain nothing but the app and an uninstall shortcut. From what little I know of your system, I think you can safely “Remove” those folders from within Lightroom. You should not get a dialog box to “Delete from Disk”. If you do, you want to select “Remove from Lightroom”.