Remove redundant includes.

diff --git a/dlls/ntdll/debugtools.c b/dlls/ntdll/debugtools.c
index dcae37f..b8a8706 100644
--- a/dlls/ntdll/debugtools.c
+++ b/dlls/ntdll/debugtools.c
@@ -21,9 +21,6 @@
 #include "config.h"
 #include "wine/port.h"
 
-#include "config.h"
-#include "wine/port.h"
-
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>