How can I remove a app from just the I watch and not the iPhone?

Press the Digital Crown on your Apple Watch to bring up the App View.

If you're using List View, swipe left across the app you want to remove, then tap the red trash button. If you're using Grid View, tap and hold to activate jiggle mode, then tap the X in the top-left corner of the app you want to remove.

Tap Delete App to confirm.

I would just remove this part of your answer:

“the X in the top-left corner of”

and add that in jiggle mode the apps are jiggling and have an X in the corner if the app is removable.

The OP marked the this thread as solved so I won't be removing anything.

It's still wrong.

fiery - good self-description.