Remove ads from theme?

I am using the Brown Magic free WordPress theme: https://www.skinpress.com/brownmagic-theme/

but I cannot for the life of me find out how to edit or remove those 4 ad boxes on the right hand side.

I’ve tinkered about with the widgets and looked through the theme files but cannot see a reference to them.

My site is here: https://www.bangkokblogger.com/

Any idea where they are?

Thanks.