These are your options:
(1) Change form Liquorice to a theme that does not have this feature. Most themes do not have it.
(2) Retain the theme you have and remove the information in the “About you” field found on this page > Users > My Profile then there will be nothing to display.
(3) WordPress.com provides a CSS editing preview mode and when used visitors cannot see any changes on the blog. It’s a try before you buy an annually renewable CSS upgrade. Provided you have CSS editing experience you can try editing the CSS and see if that works for you. Appearance > Edit CSS
@alfarhan85, this can be done through the CSS upgrade if you have CSS editing experience, but it sort of blows up the bar at the bottom that has the comment link and such in it and I’ve not the time to figure out how to get the bar to show without the cats/date/author. It can probably be done, I just don’t have the time. At any rate, it would require the purchase of the CSS upgrade if it is possible.