Related to another comment posted earlier, this section  also notes
that images in use by projects are considered automatically to be useful for an
educational purpose, but those that are not and which are judged to be
not educational can be deleted.
I've successfully nominated
several hundred personal images of users for deletion using this
criterion, as they were not in use.
The proper procedure if this
image is disliked would be to see if it falls within one of the
examples  of items that would be out of scope if unused. It can then
be nominated for deletion.
However, as already seen, whether an unused image is educational is subject to quite a bit of debate.