wanda11@mac.com on "Entry meta - how to delete"

Hi

I want to edit post meta on a twentytwelve theme for this site - http://www.wheresthebeach.org

I'd like to remove:
'This entry was posted in Sport in The Beaches and tagged Children, Sport on May 23, 2013 by Where's The Beach admin.'

and just have

'By author' (ideally just under the post title)

With CSS editor I managed to delete the date (.entry-date {display: none;}) but I can't figure out how to do the same for the rest.

Tried .post-categories, .post-tags {display: none!;} and may variations!

Any help would be lovely.

Cheers