[gtk+] Fix the docs build after offscreen window removal

[Matthias Clasen <matthiasc src gnome org>]

commit dd0f700bfd7545df0d3ad31d195b2298b7dabc14
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 25 21:46:14 2016 -0400

    Fix the docs build after offscreen window removal

 docs/reference/gtk/gtk4.types.in |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gtk/gtk4.types.in b/docs/reference/gtk/gtk4.types.in
index ab7b681..5bcd2a0 100644
--- a/docs/reference/gtk/gtk4.types.in
+++ b/docs/reference/gtk/gtk4.types.in
@@ -108,7 +108,6 @@ gtk_message_dialog_get_type
 gtk_model_button_get_type
 gtk_mount_operation_get_type
 gtk_notebook_get_type
-gtk_offscreen_window_get_type
 gtk_orientable_get_type
 gtk_overlay_get_type
 gtk_pad_controller_get_type