The rumors were true—iOS 10 finally lets you remove those pesky stock apps that you never use. It's an amazingly simple process, so I suppose this is more of a PSA than a full-fledged how-to. But bloatware like the Apple Watch app and its useless friends can finally be removed rather than tucked away in a folder you'll never use, so I'll give you the rundown below. (Note: while this removes them from the home screen, it does not really delete them from your device.)
This new feature works the way it always has, so start by long-pressing any icon on your home screen. When the apps start to shake around a bit, simply hunt down any stock bloatware that you'd like to remove, then tap the small "X" button just above it. You'll be prompted to verify your choice, so hit "Remove" on this popup, then the annoying app will evaporate from your home screen.
You can repeat this process as many times as you'd like, and only the essentials are off limits. When you're done removing apps, simply press your Home button to finalize your work.
Apps you can't remove include Settings, Clock, App Store, Health, Messages, Phone, Safari, Find iPhone, Wallet, Camera, or Photos. However, you can still disable a few of them, namely Safari and Camera, via the Restrictions.
Should you decide at a later point in time that you want one of these apps back, it's as simple as taking a quick trip to the App Store. Just search for the app you removed, then tap the cloud icon to install it again, and you'll be all set to go.