kernel32/tests: Remove variable ret which is not really used from load_blackbox. (RESEND)

[Gerald Pfeifer]

On Sun, 9 May 2010, testbot at testbot.winehq.org wrote:
> While running your changed tests on Windows, I think I found new failures.
> Being a bot and all I'm not very good at pattern recognition, so I might be
> wrong, but could you please double-check?
> Full results can be found at
> http://testbot.winehq.org/JobDetails.pl?Key=1969

I did double check, and this is a false positive.  This failure is
not (and really cannot) be caused by my patch.

Is the patch acceptable with that in mind?

Gerald