msrle32: Exclude unused header

[Andrew Talbot]

Changelog:
    msrle32: Exclude unused header.

diff -urN a/dlls/msrle32/msrle32.c b/dlls/msrle32/msrle32.c
--- a/dlls/msrle32/msrle32.c	2007-01-12 19:56:16.000000000 +0000
+++ b/dlls/msrle32/msrle32.c	2007-05-10 20:37:33.000000000 +0100
@@ -25,7 +25,6 @@
 
 #include "msrle_private.h"
 
-#include "winnls.h"
 #include "winuser.h"
 
 #include "wine/debug.h"