gtkwidget: Drop gtk_widget_device_is_shadowed()

A widget no longer needs updating on GTK grabs on itself, drop
this miscellaneous and no longer used API.

docs/reference/gtk/gtk4-sections.txt

@@ -4503,7 +4503,6 @@ gtk_widget_set_receives_default
 gtk_widget_get_receives_default
 gtk_widget_get_realized
 gtk_widget_get_mapped
-gtk_widget_device_is_shadowed
 gtk_widget_get_opacity
 gtk_widget_set_opacity
 gtk_widget_get_overflow

gtk/gtkwidget.c

@@ -5218,48 +5218,6 @@ _gtk_widget_set_has_grab (GtkWidget *widget,
   priv->has_grab = has_grab;
 }
 
-/**
- * gtk_widget_device_is_shadowed:
- * @widget: a #GtkWidget
- * @device: a #GdkDevice
- *
- * Returns %TRUE if @device has been shadowed by a GTK+
- * device grab on another widget, so it would stop sending
- * events to @widget. This may be used in the
- * #GtkWidget::grab-notify signal to check for specific
- * devices. See gtk_device_grab_add().
- *
- * Returns: %TRUE if there is an ongoing grab on @device
- *          by another #GtkWidget than @widget.
- **/
-gboolean
-gtk_widget_device_is_shadowed (GtkWidget *widget,
-                               GdkDevice *device)
-{
-  GtkWindowGroup *group;
-  GtkWidget *grab_widget;
-  GtkRoot *root;
-
-  g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
-
-  if (!_gtk_widget_get_realized (widget))
-    return TRUE;
-
-  root = _gtk_widget_get_root (widget);
-
-  if (GTK_IS_WINDOW (root))
-    group = gtk_window_get_group (GTK_WINDOW (root));
-  else
-    group = gtk_window_get_group (NULL);
-
-  grab_widget = gtk_window_group_get_current_grab (group);
-  if (grab_widget && widget != grab_widget &&
-      !gtk_widget_is_ancestor (widget, grab_widget))
-    return TRUE;
-
-  return FALSE;
-}
-
 /**
  * gtk_widget_set_name:
  * @widget: a #GtkWidget

gtk/gtkwidget.h

@@ -427,10 +427,6 @@ void      gtk_widget_set_receives_default (GtkWidget           *widget,
 GDK_AVAILABLE_IN_ALL
 gboolean  gtk_widget_get_receives_default (GtkWidget           *widget);
 
-GDK_AVAILABLE_IN_ALL
-gboolean   gtk_widget_device_is_shadowed  (GtkWidget           *widget,
-                                           GdkDevice           *device);
-
 
 GDK_AVAILABLE_IN_ALL
 void                  gtk_widget_set_name               (GtkWidget    *widget,