Normally, when you look at the Fiori Launchpad Designer, the option to delete a custom catalog is now visible. Below is how you can do it.
- Select the custom catalog by clicking on it.
- Drag the selected catalog. Two coloured icons will appear at the bottom of the pane.
- Drop the selected catalog on the delete (red) icon.
- A Confirmation dialog box will appear.
- Click on OK to confirm the deletion. The message below will appear showing that the deletion was done successfully.