What do you want to achieve? Do you want to remove the photos from Imports, but keep them in an album?
Or do you want to delete the recently deleted photos completely from your library?
If you want to delete a photo from Imports, the library and all albums, you can select it in Imports and then ctrl-click it or right-click it,Use the command "delete photo" from the menu that will appear.
But it is not possible t delete photos from in Imports, and keep them in an album. Imports and other predefined albums are smart albums. Import will show all photos in your library, but sorted by the day of import. This album is meant to be showing all photos in your library. Deleting a photo from Imports will remove it from your Photos Library, and the photo will be removed from all albums.
Photos are stored only once in the library, and Albums are just using the photos. Albums are not storing additional copies.