[gnome-games] steam: Remove now unused SteamGameSource

[Adrien Plazas <aplazas src gnome org>]

commit 4ec925960c3f3a7199513475eb71924b07e24695
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat May 6 11:09:51 2017 +0200

    steam: Remove now unused SteamGameSource
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781334

 plugins/steam/src/Makefile.am            |    1 -
 plugins/steam/src/steam-game-source.vala |  112 ------------------------------
 2 files changed, 0 insertions(+), 113 deletions(-)
---
diff --git a/plugins/steam/src/Makefile.am b/plugins/steam/src/Makefile.am
index 2d50867..6f2baf1 100644
--- a/plugins/steam/src/Makefile.am
+++ b/plugins/steam/src/Makefile.am
@@ -8,7 +8,6 @@ libgames_steam_plugin_la_DEPENDENCIES = \
 libgames_steam_plugin_la_SOURCES = \
        steam-cover.vala \
        steam-error.vala \
-       steam-game-source.vala \
        steam-icon.vala \
        steam-plugin.vala \
        steam-registry.vala \