How to remove apps on my Apple Watch using my iphone

This Apple document should do it

Delete apps from your Apple Watch - Apple Support

Hello pemdas123,

Thank you for reaching out to Apple Support Communities.

These steps will walk you through deleting apps on your Apple Watch:

"How to use your iPhone to manage your watch apps

1. Open the Watch app on your iPhone, then tap the My Watch tab. 
2. Scroll to the Installed on Apple Watch section and find the app that you want to remove.
3. Tap the app, then turn off Show App on Apple Watch."

More details can be found here: Delete apps from your Apple Watch

Cheers!