You can permanently remove custom folders from the Catalog. However, you cannot remove any folders provided with the stock Catalog or linked contents in a linked folder.
Removing a custom folder from the Catalog also permanently removes all child folders and learning assets in the folder. If the folder's contents include custom assets that are not located elsewhere in the Catalog, this permanently removes them from the site. Before removing a folder, carefully examine its contents and copy any custom assets to a different folder, if necessary.
To remove a folder
The Library page displays.
Note: The Library is not updated with your changes until you exit the Library page.