pdh: Remove or fix tests that fail on Windows.

[Jeff Latimer]

Hans Leidekker wrote:
> Jeff, this is how I would solve the problem. Do you see what I mean?
>
>   
Hans, I took your point from the posts a couple of weeks ago.  I have 
been trying to set up a test bed where I have a few variants of Windows 
to test with and hence the delay.  The current patch I submitted was 
cleaning up the Null reference issue before moving on to sorting out the 
rest of the tests.  I think we have been talking at cross purposes about 
the current patch.  As I was not dealing with XP issues but I only have 
XP and ME to test with at the moment hence I can't tell if there is an 
issue.
Jeff