cleaning up Microsoft Windows ifdef'ery

[Noel Grandin]

On 2016/01/28 2:01 PM, Michael Stahl wrote:
>
> well... that begs the question, do we really need to define our own
> platfrom discriminating macros, if the platform already defines such?
>

Good point. I personally don't really care which one we choose, I'd just like to increase the consistency in our codebase.

Even if we did switch to using the platform macro, we could not remove the WNT macro totally, since it appears to be 
used in things like .scp and .mk files