[gtk+] widget: Remove stray prototype

[Timm Bäder <baedert src gnome org>]

commit dea82336630fe50f1f9a8b548eb78776e5b39d9b
Author: Timm Bäder <mail baedert org>
Date:   Wed Nov 1 11:23:36 2017 +0100

    widget: Remove stray prototype
    
    gtk_cairo_transform_to_window is gone.

 gtk/gtktreeview.c |    1 -
 gtk/gtkwidget.h   |    5 -----
 2 files changed, 0 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index ef2bbee..c33654b 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -5321,7 +5321,6 @@ gtk_tree_view_snapshot (GtkWidget   *widget,
 
       gtk_style_context_get_color (context, &color);
       cairo_save (cr);
-      gtk_cairo_transform_to_window (cr, GTK_WIDGET (tree_view), tree_view->priv->drag_highlight_window);
       if (tree_view->priv->drag_column_window_state == DRAG_COLUMN_WINDOW_STATE_ORIGINAL)
         {
           cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.0);
diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index cf10928..a8af148 100644
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -965,11 +965,6 @@ GDK_AVAILABLE_IN_ALL
 gboolean   gtk_widget_get_has_tooltip       (GtkWidget   *widget);
 
 GDK_AVAILABLE_IN_ALL
-void       gtk_cairo_transform_to_window    (cairo_t     *cr,
-                                             GtkWidget   *widget,
-                                             GdkWindow   *window);
-
-GDK_AVAILABLE_IN_ALL
 GType           gtk_requisition_get_type (void) G_GNUC_CONST;
 GDK_AVAILABLE_IN_ALL
 GtkRequisition *gtk_requisition_new      (void) G_GNUC_MALLOC;