It's possible to remove netplay, but if you are not using netplay such will have no impact on performance.
You can sometimes disable some parts of emulation (EFB / XFB / etc) to improve performance, but these are typically already set up optimally so most revisions will result in things being broken in game.
You can sometimes disable some parts of emulation (EFB / XFB / etc) to improve performance, but these are typically already set up optimally so most revisions will result in things being broken in game.