Delete image from custom field

-- url of the page with the problem -- : none
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.4.10
-- Browser(s) name and version -- : any
-- Error-message(debug-mod must be tuned on) -- : none

Hey,

i have created a custom field on the category, but after uploading the image, there is no delete function like on all the other images to remove images again from that field ?

That means i can only replace it by uploading a new image.

that worked