Hi Maria,
Thank you for reaching out. Your BoldGrid account is only associated with our BoldGrid plugins and themes. In order to remove your account simply Uninstall all BoldGrid products from your WordPress dashboard under plugins and/or themes. I see you have a basic connect key provided by your hosting company (InMotion), but that is included with all InMotion plans because they are one of our premium partners.
If you wish to delete your website altogether you’ll need to reach out to InMotion Hosting or follow this guide to learn how to do so yourself.
I hope this helps. Please reach back out if you have any other questions for us.