Yes, it's there but it doesn't hurt or hinder any action by its presence. Think of the Panorama and HDR functionality that's also there. If you do not use it, it doesn't do anything.
Meanwhile, the ability to do Enhance is burnt into ACR so you cannot remove or disable it. It's there. On the other hand, if you update your OS at sometime in the future, it'l be there waiting for you.
FWIW, your ability to continue with Windows 7 will sunset at some point with Adobe software. After updating at that time Enhance will be there waiting for you to use it or not at that time.