[gtk+] filechooserwidget: Remove useless gtk_widget_show call

[Timm Bäder <baedert src gnome org>]

commit 3d2c81c8f1dd890c6a47f778ee86078062e024e7
Author: Timm Bäder <mail baedert org>
Date:   Sun Apr 2 18:24:17 2017 +0200

    filechooserwidget: Remove useless gtk_widget_show call

 gtk/gtkfilechooserwidget.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkfilechooserwidget.c b/gtk/gtkfilechooserwidget.c
index ce2df3b..6524503 100644
--- a/gtk/gtkfilechooserwidget.c
+++ b/gtk/gtkfilechooserwidget.c
@@ -6322,7 +6322,6 @@ add_custom_button_to_dialog (GtkDialog   *dialog,
 
   button = gtk_button_new_with_mnemonic (mnemonic_label);
   gtk_widget_set_can_default (button, TRUE);
-  gtk_widget_show (button);
 
   gtk_dialog_add_action_widget (GTK_DIALOG (dialog), button, response_id);
 }