diff --git a/gdk/gdksubsurfaceprivate.h.orig b/gdk/gdksubsurfaceprivate.h.orig
deleted file mode 100644
index ad4204f542..0000000000
--- a/gdk/gdksubsurfaceprivate.h.orig
+++ /dev/null
@@ -1,107 +0,0 @@
-/* GDK - The GIMP Drawing Kit
- * Copyright (C) 2023 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library. If not, see <http://www.gnu.org/licenses/>.
- */
-
-/* Uninstalled header defining types and functions internal to GDK */
-
-#pragma once
-
-#include "gdkenumtypes.h"
-#include "gdksurface.h"
-#include <graphene.h>
-
-G_BEGIN_DECLS
-
-typedef struct _GdkSubsurface GdkSubsurface;
-typedef struct _GdkSubsurfaceClass GdkSubsurfaceClass;
-
-#define GDK_TYPE_SUBSURFACE              (gdk_subsurface_get_type ())
-#define GDK_SUBSURFACE(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_SUBSURFACE, GdkSubsurface))
-#define GDK_SUBSURFACE_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_SUBSURFACE, GdkSubsurfaceClass))
-#define GDK_IS_SUBSURFACE(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_SUBSURFACE))
-#define GDK_SUBSURFACE_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_SUBSURFACE, GdkSubsurfaceClass))
-
-struct _GdkSubsurface
-{
-  GObject parent_instance;
-
-  GdkSurface *parent;
-
-  int ref_count;
-
-  gboolean above_parent;
-  GdkSubsurface *sibling_above;
-  GdkSubsurface *sibling_below;
-};
-
-typedef enum {
-  GDK_TEXTURE_TRANSFORM_NORMAL,
-  GDK_TEXTURE_TRANSFORM_90,
-  GDK_TEXTURE_TRANSFORM_180,
-  GDK_TEXTURE_TRANSFORM_270,
-  GDK_TEXTURE_TRANSFORM_FLIPPED,
-  GDK_TEXTURE_TRANSFORM_FLIPPED_90,
-  GDK_TEXTURE_TRANSFORM_FLIPPED_180,
-  GDK_TEXTURE_TRANSFORM_FLIPPED_270,
-} GdkTextureTransform;
-
-struct _GdkSubsurfaceClass
-{
-  GObjectClass parent_class;
-
-  gboolean     (* attach)          (GdkSubsurface         *subsurface,
-                                    GdkTexture            *texture,
-                                    const graphene_rect_t *source,
-                                    const graphene_rect_t *dest,
-                                    GdkTextureTransform    transform,
-                                    const graphene_rect_t *bg,
-                                    gboolean               above,
-                                    GdkSubsurface         *sibling);
-  void         (* detach)          (GdkSubsurface         *subsurface);
-  GdkTexture * (* get_texture)     (GdkSubsurface         *subsurface);
-  void         (* get_source)      (GdkSubsurface         *subsurface,
-                                    graphene_rect_t       *source);
-  void         (* get_dest)        (GdkSubsurface         *subsurface,
-                                    graphene_rect_t       *dest);
-  GdkTextureTransform
-               (* get_transform)   (GdkSubsurface         *subsurface);
-};
-
-GType           gdk_subsurface_get_type        (void) G_GNUC_CONST;
-
-GdkSurface *    gdk_subsurface_get_parent      (GdkSubsurface         *subsurface);
-
-gboolean        gdk_subsurface_attach          (GdkSubsurface         *subsurface,
-                                                GdkTexture            *texture,
-                                                const graphene_rect_t *source,
-                                                const graphene_rect_t *dest,
-                                                GdkTextureTransform    transform,
-                                                const graphene_rect_t *background,
-                                                gboolean               above,
-                                                GdkSubsurface         *sibling);
-void            gdk_subsurface_detach          (GdkSubsurface         *subsurface);
-GdkTexture *    gdk_subsurface_get_texture     (GdkSubsurface         *subsurface);
-void            gdk_subsurface_get_source      (GdkSubsurface         *subsurface,
-                                                graphene_rect_t       *source);
-void            gdk_subsurface_get_dest        (GdkSubsurface         *subsurface,
-                                               graphene_rect_t       *dest);
-gboolean        gdk_subsurface_is_above_parent (GdkSubsurface         *subsurface);
-GdkTextureTransform
-                gdk_subsurface_get_transform   (GdkSubsurface         *subsurface);
-
-
-G_END_DECLS
-