I’ve set up a new instance of Omeka-S, and the last step is for our enterprise IT group to poke a hole in the firewall for it. Before they do, though, they run it through a Security scan. The scan found the following files, which seem to be remnants of development environments, and they will not proceed until these files are inaccessible:
package.json files are similar to composer.json files, just for a different language’s package manager.
For the one within the Omeka S assets folder, deleting it is fine. On your theme, you probably only need those where you’re actually working on the theme, not on the live site.