bc2003 :
I was told that if I remove the xbox app I would see better game performance as it wouldn't be hindering certain games.
I do not have or use xbox but only pc and ps4. is this true to use the power shell and remove or does it have no effect?
You were told wrong, by an idiot that doesn't understand what it does. The xbox app is basically steam and xbox live put together, and has an OPTIONAL video recording program that will reduce game performance when active. Do not try to remove it unless you want to screw yourself over at a later date when you decide you do want to use it.
If you don't log into the app or use it, it does nothing, so if you don't want it just unpin the tile and don't use it.