Hidden template in CP6

i use templates lot, development , branding. basic template has slides examples of objects might needed, such graphics.

i've found that, although slides removed finished project, apparently remain in template. there doesn't seem way @ template, except delete 1 of images in template slides. i'm warned image in use, , when delete it, template slide appears on screen (without image).

i'd delete these example slides finished project. know of way?