Hello 

i want delete icon image on publish a add, but just delete the sub-category icon. The category icon stay..

http://imgur.com/a/tU2ok

Thank you
Best greetings

@classifieds
Add this to your style.css:
.flat-wrap .single .parent-icon {display:none!important;}

Taking advantage of the topic, I wanted to know how to change the image to place other icons without being a font-image, and I also want to display only the category image on the desktop, from the non-subcategories ...
how to make?

You can use just font icons or just images. In this section only font icons are shown.

How do I put images and not font icons?

@Leandro
Go to theme settings and specify icons and colors for each category.

@frosticek Send me a css code to block the icons of the subcategories via desktop, I used the code above that used in this topic and blocked the moment of posting the ad, now I also want both to navigate the subcategories without icons, only the categories have, subcategories do not

@Leandro
I do not have such code, identify all css elements and add display:none to them.