Removed some unnecessary inclusions of thread.h

diff --git a/dlls/kernel/process.c b/dlls/kernel/process.c
index 5c63387..59da574 100644
--- a/dlls/kernel/process.c
+++ b/dlls/kernel/process.c
@@ -37,7 +37,8 @@
 #include "wine/winuser16.h"
 #include "ntstatus.h"
 #include "winioctl.h"
-#include "thread.h"
+#include "winreg.h"
+#include "winternl.h"
 #include "module.h"
 #include "kernel_private.h"
 #include "wine/exception.h"