Found that using Settings on phone to remove a watch face app did not remove the watch face from the Android Wear app or from the wearable. This method worked.
- Connect phone and wearable to Android Studio as if you were going to run/install an app.
- In Android Studio terminal enter ‘adb devices’ to get device names.
- Enter ‘adb -s device-name uninstall com.your.package-name’ for each device (ie the phone and the wearable).