Get rid of 'Posted in Uncategorized' Catch Box

First day, first time trying to do a WordPress site. https://www.rugbyartistsgroup.org.uk I’m trying to get rid of the ‘Posted in Uncategorised’ that appears after every post. I don’t need categories to be visible, it’s a very simple site. I’ve searched the forum and seen several bits of code to delete in several different places, but cannot find the relevant bit in Catch Box despite some hours of searching. Please help.