This can be a simple forward declaration

Change-Id: Iba4c19ee3c81c96dfd5e2ab6145ec6a6aec3a03f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113444
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/include/vcl/fileregistration.hxx b/include/vcl/fileregistration.hxx
index ad9ac87..68a0f26 100644
--- a/include/vcl/fileregistration.hxx
+++ b/include/vcl/fileregistration.hxx
@@ -12,7 +12,11 @@
#include <sal/config.h>

#include <vcl/dllapi.h>
#include <vcl/weld.hxx>

namespace weld
{
class Window;
}

namespace vcl::fileregistration
{