You would find it at Configuration > Design > Affiliate panel theme > click "Edit theme" on the currently active theme > and look up home.tpl
Click the 'home.tpl' and you will see its code on the right side. From its code remove:
NOTE: if you are trying to edit a default theme (created upon installation of Post Affiliate Pro), the system will claim to create a copy of the theme, because the default themes are overwritten by each update of the application. For more info click here.