How to remove the Photos from your Public Profile 

Go to MY >then Photos 

Click on the left hand side "customize profile photos"

Remove the pics from the right side and save. 

Return to your Home page 

Go to MY > public profile and hover over any photos that remain  and hide them. The box that has a "X" (says Hide) allowing you to remove it. Last one will not disappear, go back to your homepage  and return. It'll be gone then. 

This link also helps:

https://fubar.com/photogrid_settings.php