[gnome-boxes] wizard-source: Drop unused variable

[Felipe Borges <felipeborges src gnome org>]

commit 49d93b95dd8a170f17040a1245c856936dc747ac
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Dec 19 16:33:57 2018 +0100

    wizard-source: Drop unused variable
    
    This is a leftover from a4829f2a0.

 src/wizard-source.vala | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/wizard-source.vala b/src/wizard-source.vala
index 3938e92e..e0596e65 100644
--- a/src/wizard-source.vala
+++ b/src/wizard-source.vala
@@ -389,7 +389,6 @@ public void setup_ui (AppWindow window) {
     }
 
     private async void populate_recommended_downloads () {
-        var os_db = media_manager.os_db;
         foreach (var media in yield get_recommended_downloads ()) {
             downloads_model.append (media);
         }