[gtk] container: Remove an unnecessary check

[Matthias Clasen <matthiasc src gnome org>]

commit 7927bcf6c5268b0f84f522626ac6983d5e8826db
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 21 23:19:24 2020 -0500

    container: Remove an unnecessary check
    
    GtkWindow implements GtkRoot, so we can avoid
    treating them separately.

 gtk/gtkcontainer.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/gtk/gtkcontainer.c b/gtk/gtkcontainer.c
index 3650f4ee97..9da5fb4c6e 100644
--- a/gtk/gtkcontainer.c
+++ b/gtk/gtkcontainer.c
@@ -371,9 +371,7 @@ gtk_container_idle_sizer (GdkFrameClock *clock,
    */
   if (gtk_widget_needs_allocate (GTK_WIDGET (container)))
     {
-      if (GTK_IS_WINDOW (container))
-        gtk_window_check_resize (GTK_WINDOW (container));
-      else if (GTK_IS_ROOT (container))
+      if (GTK_IS_ROOT (container))
         gtk_native_check_resize (GTK_NATIVE (container));
       else
         g_warning ("gtk_container_idle_sizer() called on a non-native non-window");