How to remove header from jira link icon, using Souce editor on confluence?

[Daniel]

Hi, Im trying to create a follow-up jira tasks table on confluence and I want only the icon "status" in my table (without this header "status" over it). I found in some other discussion some way to remove using CSS, but I'm using old Confluence version (7.13.4). Is there a way to do with Source editor, or other?

Thanks in advance