activeds: Exclude unused headers

[Andrew Talbot]

Changelog:
    activeds: Exclude unused headers.

diff -urN a/dlls/activeds/activeds_main.c b/dlls/activeds/activeds_main.c
--- a/dlls/activeds/activeds_main.c	2006-10-04 20:34:11.000000000 +0100
+++ b/dlls/activeds/activeds_main.c	2007-04-21 13:12:26.000000000 +0100
@@ -29,9 +29,6 @@
 #include "windef.h"
 #include "winbase.h"
 #include "winuser.h"
-#include "winreg.h"
-#include "winver.h"
-#include "winnls.h"
 
 #include "objbase.h"
 #include "iads.h"