dmstyle: Exclude unused headers

[Andrew Talbot]

Changelog:
    dmstyle: Exclude unused headers.

diff -urN a/dlls/dmstyle/dmutils.c b/dlls/dmstyle/dmutils.c
--- a/dlls/dmstyle/dmutils.c	2007-04-25 17:42:58.000000000 +0100
+++ b/dlls/dmstyle/dmutils.c	2007-05-01 20:40:56.000000000 +0100
@@ -31,9 +31,7 @@
 #include "winuser.h"
 
 #include "wine/debug.h"
-#include "wine/list.h"
 #include "wine/unicode.h"
-#include "winreg.h"
 #include "objbase.h"
 
 #include "dmusici.h"