To remove items from your galleries list, access your website builder through the Website Manager.
Open the page that contains your Galleries and click the Change Album.
From there, you can select the specific albums you wish to remove from your galleries and click Apply.
Once you remove the selected albums, you can see the updated list of album grids, and the changes will be automatically reflected on your website.
Note: If you want to delete the respective albums entirely from your organizer, ensure you remove them from your website first by following the aforementioned steps. Afterward, you can proceed to delete them from your organizer.