[retro-gtk] retro-gtk: Remove unused the 'button_name' variable

[Adrien Plazas <aplazas src gnome org>]

commit a6ac0de1b188f3e1b9794d7d794c9c7378fe83bf
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Sep 9 12:14:14 2016 +0200

    retro-gtk: Remove unused the 'button_name' variable
    
    Remove the unsused 'button_name' variable in the prompt_button() method
    of GamepadConfigurationDialog.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771169

 retro-gtk/input/gamepad-configuration-dialog.vala |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/retro-gtk/input/gamepad-configuration-dialog.vala 
b/retro-gtk/input/gamepad-configuration-dialog.vala
index 243dc78..ad9ee66 100644
--- a/retro-gtk/input/gamepad-configuration-dialog.vala
+++ b/retro-gtk/input/gamepad-configuration-dialog.vala
@@ -76,8 +76,6 @@ public class GamepadConfigurationDialog : Gtk.Dialog {
 
                view.highlight_button ((GamepadButtonType) button, true);
 
-               var button_name = button.to_string ();
-
                if (header_bar is HeaderBar)
                        (header_bar as HeaderBar).set_title ("Press a key for the this button");
        }