How do I delete apps from iCloud?

See Remove apps from iPad - Apple Support

However, apps on your iPad aren't "in" iCloud, they are on your device. The ones "in" iCloud are the ones available for re-downloading from Apple. In that case you may be asking about removing apps from your purchase history. You cannot delete them from your iCloud list of purchased apps, you can only hide them:

Hide purchases from the App Store - Apple Support

Your profile shows using an ipad see the article Delete apps on your iPhone, iPad and iPod touch – Apple Support

No, your iCloud storage is not used. The apps are part of Apple's App Store collection and are available for redownloading from their "space" not yours.