[gnome-games] core: Remove unused GameCollection.game_added()

[Adrien Plazas <aplazas src gnome org>]

commit 1474bba9ad69fdaecf3eca8363af7076ded4e178
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sun May 7 16:33:38 2017 +0200

    core: Remove unused GameCollection.game_added()
    
    We stopped using it in the previous commit.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782295

 src/core/game-collection.vala |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/src/core/game-collection.vala b/src/core/game-collection.vala
index 47a349e..f9fae4a 100644
--- a/src/core/game-collection.vala
+++ b/src/core/game-collection.vala
@@ -1,8 +1,6 @@
 // This file is part of GNOME Games. License: GPL-3.0+.
 
 public class Games.GameCollection : Object {
-       public signal void game_added (Game game);
-
        private GenericSet<Game> games;
        private ListStore list_store;
 
@@ -42,7 +40,6 @@ public class Games.GameCollection : Object {
                        factories_for_scheme[scheme].append_val (factory);
                }
 
-               factory.game_added.connect ((game) => game_added (game));
                factory.game_added.connect ((game) => store_game (game));
        }