After adding icon to home screen, the icon in the apps screen remains I have put a few applications in a folder on the home screen, but their icons are still displayed on one of the apps screens.

How can I remove those still on the apps screen?
The app icon on the home screen is just a shortcut to the app. The purpose of the app drawer is to show all installed apps.

If an app is installed, you can't remove it from the app drawer, unless you uninstall the app itself.

Consider the icons placed on your home screen as shortcuts, like on desktop in Windows.