[gtk] widget: Don't mention gtk_widget_snapshot() in the docs

[Timm Bäder <baedert src gnome org>]

commit a54e5844b6e82fa9cb57608a0ea1c3a1c69417f6
Author: Timm Bäder <mail baedert org>
Date:   Sat Apr 21 19:44:45 2018 +0200

    widget: Don't mention gtk_widget_snapshot() in the docs
    
    It's not public so people can't know about it.

 gtk/gtkwidget.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index e7ab8010c7..d565719854 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -13499,9 +13499,7 @@ gtk_widget_forall (GtkWidget   *widget,
  * the @snapshot the widget received.
  *
  * gtk_widget_snapshot_child() takes care of translating the origin of
- * @snapshot, and deciding whether the child needs to be snapshot. It is a
- * convenient and optimized way of getting the same effect as calling
- * gtk_widget_snapshot() on the child directly.
+ * @snapshot, and deciding whether the child needs to be snapshot.
  **/
 void
 gtk_widget_snapshot_child (GtkWidget   *widget,