Can’t get rid of ? | Category links

Hi,

for the last 2 hrs I tried to get rid of the » in front of the category links:

https://www.abstractidea.ch/download_temp/wp.png

I tried in the CSS and to change the style to list-style:none etc, but unfortunately not successfull. Then I startet to look for » over the hole code to just delte, but I wasn’t able. Can anybody help me? I would be very grateful. Thank you in advance!

Best Jean Baptiste