We want to erase our short story

[Hermanas]

Hello!! We are the authors of this short story (Ofelia y Gretel): https://www.goodreads.com/book/show/6...
As it is only a "gift" that the publishing house is giving when people buy the book, it's not a book itself... We don't see the need of having it here, as we don't want people thinking it is a complete individual book (we're publishing new books and this kind of gets in the way to really show readers what our books are).
Will it be possible? Thank you!! :)

[David]

Was already done by someone else.