Removing old watch data from phone

[Pagemakers]

I reset my watch to factory settings. It has un-paired from the iPhone watch app, but I am left with the Activity app on my iPhone home screen and my Watch still registered as a data source in Health App.

How do I remove both?

 

[Night Spring]

Did you follow this method?
https://support.apple.com/en-us/HT204568

 

[Pagemakers]

Exactly that.