[gnome-clocks] Remove mouse button back custom handling

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 76cfc4eb2818d0a3609ef2bf04786ad2afff01dc
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Tue Dec 14 13:08:16 2021 +0100

    Remove mouse button back custom handling
    
    This is supported by libadwaita now.

 src/window.vala | 9 ---------
 1 file changed, 9 deletions(-)
---
diff --git a/src/window.vala b/src/window.vala
index 6ee3afe2..a269bb8d 100644
--- a/src/window.vala
+++ b/src/window.vala
@@ -134,11 +134,6 @@ public class Window : Adw.ApplicationWindow {
             add_css_class ("devel");
         }
 
-        const uint BUTTON_BACK = 8;
-        var gesture_click = new Gtk.GestureClick ();
-        gesture_click.button = BUTTON_BACK;
-        gesture_click.released.connect (button_back_released);
-
         this.hide_on_close = true;
     }
 
@@ -264,10 +259,6 @@ public class Window : Adw.ApplicationWindow {
         return handled;
     }
 
-    private void button_back_released (int n_press, double x, double y) {
-        on_back_activate ();
-    }
-
     private void on_help_activate () {
         Gtk.show_uri (this, "help:gnome-clocks", Gdk.CURRENT_TIME);
     }