Yea, I did mean just that line.
However, by changing it to zero you have now disabled it. It will do absolutely no harm to leave it as is.
I just get anal about "spare" things in my registry!!
If you do decide to remove just backup (export) the whole registry key that it is a part of (good practice) just in case a slip of the finger, and a jump of the mouse and you've removed the wrong entry!!