Hi Amelia-
Thanks for reaching out, and thanks for using the BoldGrid Inspirations WordPress site builder.
There are two steps you’ll need to do to remove an image from your Attribution page.
First, delete the image from your media library. Navigate to Media > Library, locate the image, click on it, and select Delete permanently.
Once it’s deleted, BoldGrid Inspirations needs to rebuild its attribution database. The easiest way to do that is to visit your Customizer, change a setting, publish that change, and then change it back. For example, you can visit your Customize > Colors menu, click on one of your colors, and click Publish without actually changing the color.
One your Customizer has been published, your attribution page will no longer have that deleted image.