[gtk/controllers-list: 2/3] Revert "Add gtk_widget_prepend_controller"

[Matthias Clasen <matthiasc src gnome org>]

commit 1c16cb751fc3542a48f7df10719bf00b3f0d1157
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 2 11:54:29 2020 -0400

    Revert "Add gtk_widget_prepend_controller"
    
    This reverts commit 692cc42e1023ec439d2fa1a0b9456e8cbfe1cec8.

 gtk/gtkwidget.c        | 17 -----------------
 gtk/gtkwidgetprivate.h |  3 ---
 2 files changed, 20 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index c7b0117538..8afac750a7 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -10768,23 +10768,6 @@ gtk_widget_add_controller (GtkWidget          *widget,
     gtk_list_list_model_item_added_at (priv->controller_observer, priv->controllers->len - 1);
 }
 
-void
-gtk_widget_prepend_controller (GtkWidget          *widget,
-                               GtkEventController *controller)
-{
-  GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
-
-  GTK_EVENT_CONTROLLER_GET_CLASS (controller)->set_widget (controller, widget);
-
-  if (G_UNLIKELY (!priv->controllers))
-    priv->controllers = g_ptr_array_new ();
-
-  g_ptr_array_insert (priv->controllers, 0, controller);
-
-  if (priv->controller_observer)
-    gtk_list_list_model_item_added_at (priv->controller_observer, 0);
-}
-
 /**
  * gtk_widget_remove_controller:
  * @widget: a #GtkWidget
diff --git a/gtk/gtkwidgetprivate.h b/gtk/gtkwidgetprivate.h
index b5af950cf4..3e48575f91 100644
--- a/gtk/gtkwidgetprivate.h
+++ b/gtk/gtkwidgetprivate.h
@@ -337,9 +337,6 @@ gboolean          gtk_widget_run_controllers               (GtkWidget
                                                             double               x,
                                                             double               y,
                                                             GtkPropagationPhase  phase);
-
-void              gtk_widget_prepend_controller            (GtkWidget             *widget,
-                                                            GtkEventController    *controller);
 void              gtk_widget_handle_crossing               (GtkWidget             *widget,
                                                             const GtkCrossingData *crossing,
                                                             double                 x,