Remove author from displaying on posts

Hi

I am using the Delisious child theme from Studio press and would like to remove the author from displaying on my posts and pages.

I have found a plugin that is supposed to remove the author from both pages and posts call Post Author, but it seems to have only worked for the pages as the author still shows on my posts – you can ee this in the link below

Post: https://www.the-chicken-shack.co.uk/2012/07/11/new-chicken-shack-at-roadchef/

Page: https://www.the-chicken-shack.co.uk/feedback/

Can any one tell me how to remove this bearing in mind i am using a Genesis Child theme?

Thanks