Apple:

If you update to iOS 10 beta, you can remove some built-in apps from the Home screen on your iPhone, iPad, or iPod touch.

When you remove a built-in app from your Home screen, you also remove any related user data and configuration files. This can affect things like related system functions or information on your Apple Watch.

This is a little thing but it shows Apple is removing the hooks these apps had in the OS and making them stand alone. So we can delete them to our heart’s content.