Deprecate and ignore gtk-enable-tooltips setting

It is enabled by default except on touch input devices.

gtk/gtksettings.c

@@ -1151,6 +1151,8 @@ gtk_settings_class_init (GtkSettingsClass *class)
    * Whether tooltips should be shown on widgets.
    *
    * Since: 2.14
+   *
+   * Deprecated: 3.10: This setting is ignored.
    */
   result = settings_install_property_parser (class,
                                              g_param_spec_boolean ("gtk-enable-tooltips",

gtk/gtktooltip.c

@@ -1582,26 +1582,15 @@ tooltips_enabled (GdkEvent *event)
 {
   GdkDevice *source_device;
   GdkInputSource source;
-  GdkWindow *window;
-  gboolean enabled;
-  GdkScreen *screen;
-  GtkSettings *settings;
 
-  window = event->any.window;
   source_device = gdk_event_get_source_device (event);
 
   if (!source_device)
     return FALSE;
 
   source = gdk_device_get_source (source_device);
-  screen = gdk_window_get_screen (window);
-  settings = gtk_settings_get_for_screen (screen);
 
-  g_object_get (settings,
+  if (source != GDK_SOURCE_TOUCHSCREEN)
-		"gtk-enable-tooltips", &enabled,
-		NULL);
-
-  if (enabled && source != GDK_SOURCE_TOUCHSCREEN)
     return TRUE;
 
   return FALSE;

tests/testgtk.c

@@ -1200,22 +1200,6 @@ set_toolbar_both_horiz (GtkWidget *widget,
   gtk_toolbar_set_style (GTK_TOOLBAR (data), GTK_TOOLBAR_BOTH_HORIZ);
 }
 
-static void
-set_toolbar_enable (GtkWidget *widget,
-		    gpointer   data)
-{
-  GtkSettings *settings = gtk_widget_get_settings (widget);
-  g_object_set (settings, "gtk-enable-tooltips", TRUE, NULL);
-}
-
-static void
-set_toolbar_disable (GtkWidget *widget,
-		     gpointer   data)
-{
-  GtkSettings *settings = gtk_widget_get_settings (widget);
-  g_object_set (settings, "gtk-enable-tooltips", FALSE, NULL);
-}
-
 G_GNUC_BEGIN_IGNORE_DEPRECATIONS;
 static GtkActionEntry create_toolbar_items[] = {
     { NULL, GTK_STOCK_NEW, NULL, NULL, "Stock icon: New",
@@ -1240,11 +1224,6 @@ static GtkActionEntry create_toolbar_items[] = {
       NULL },
     { NULL },
     { NULL },
-    { NULL, NULL, "Enable", NULL, "Enable tooltips",
-      G_CALLBACK (set_toolbar_enable) },
-    { NULL, NULL, "Disable", NULL, "Disable tooltips",
-      G_CALLBACK (set_toolbar_disable) },
-    { NULL },
     { NULL, NULL, "Frobate", NULL, "Frobate tooltip",
       NULL },
     { NULL, NULL, "Baz", NULL, "Baz tooltip",