dnsapi: Exclude unused header

[Andrew Talbot]

Changelog:
    dnsapi: Exclude unused header.

diff -urN a/dlls/dnsapi/record.c b/dlls/dnsapi/record.c
--- a/dlls/dnsapi/record.c	2006-09-14 16:12:09.000000000 +0100
+++ b/dlls/dnsapi/record.c	2007-05-02 19:10:18.000000000 +0100
@@ -38,7 +38,6 @@
 
 #include "windef.h"
 #include "winbase.h"
-#include "winerror.h"
 #include "winnls.h"
 #include "windns.h"