FR: Delete assets

[dannyuk1982]

It's great now you can upload files - but you can never remove them if you want to i.e. delete an image

[bgarrant]

It would be great to delete files for sure. We need this

[bgarrant]

Jack said we can already unassociated an image with an entry, but it wont actually delete the file. I would LOVE to see an example on how to do this.

[mar627]

I fiddled for hours with this.. just needs to be something dumb simple like..

On a workshop:entry:edit save event
compare the old value of any <input type="file"> with the new value
if not equal, delete asset attached to old value