EasyBCD is not the boot manager.
It has absolutely no effect on the way your system boot or runs.
It's just an app that does what you ask it to do to the BCD when you run it.
You can uninstall it like any other app. Nothing will change.
Your Vista is already "normal".
You don't need to uninstall it.
It's just a tool in your toolbox, like notepad. If you ever need it, you'll have to install it again.
The only time you ever need to uninstall apps from your system is if you're running short of space, (not much of a consideration in the days of Tb HDDs), or you're never going to use it again.