You can't really delete them, but you can stop them from showing up on your screen temporarily.
The very fact that this hack has been highlighted by BuzzFeed is an indictment of how asinine it is that Apple still won't let you delete stock apps or set default apps.
It's 2016. Apple makes "Pro" products running iOS. Yet Apple still fails to "trust" its users enough to change default settings. (Of course, it's really about control and always has been.)
Default app changes for maps, notes, and messages are at the top of my wish list for iOS 10. Of course, that was at the top of my wish list for iOS 7, too.