Editing Minimatica 1.0.8

Hi,
I am using the theme Minimatica 1.0.8 on my website http://www.marcusgarrett.co.uk
I am struggling to find the piece of code to delete the “posted by” “on” and “full size is” info on individual pictures i.e. http://marcusgarrett.co.uk/?attachment_id=451.

The media is inserted into the post from the media library and the post is standard format

please help me
thanks in advance
marcus