[gtk+] Widget: Fix outdated comments about tooltips

[Daniel Boles <dboles src gnome org>]

commit 915d8197a0479c90003fdc627bd558ee67cca16c
Author: Daniel Boles <dboles src gnome org>
Date:   Tue Aug 15 02:11:19 2017 +0100

    Widget: Fix outdated comments about tooltips
    
    They are not usually yellow anymore, the previous advice about how to
    style them was for pre-3.20 versions, and the immediate replacement (CSS
    class .tooltip) does not seem ready for primetime.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784421

 gtk/gtkwidget.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 014552f..06f8f41 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -12794,15 +12794,12 @@ gtk_widget_real_set_has_tooltip (GtkWidget *widget,
  * @widget: a #GtkWidget
  * @custom_window: (allow-none): a #GtkWindow, or %NULL
  *
- * Replaces the default, usually yellow, window used for displaying
+ * Replaces the default window used for displaying
  * tooltips with @custom_window. GTK+ will take care of showing and
  * hiding @custom_window at the right moment, to behave likewise as
  * the default tooltip window. If @custom_window is %NULL, the default
  * tooltip window will be used.
  *
- * If the custom window should have the default theming it needs to
- * have the name “gtk-tooltip”, see gtk_widget_set_name().
- *
  * Since: 2.12
  */
 void