[gnome-boxes] Remove a redundant comment

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit da85457fca5e8b89cf622d540c33cee329876f82
Author: Lasse Schuirmann <lasse schuirmann gmail com>
Date:   Mon Oct 27 17:23:57 2014 +0100

    Remove a redundant comment
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725386

 src/installer-media.vala |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/installer-media.vala b/src/installer-media.vala
index 7a23cde..0b3cb6c 100644
--- a/src/installer-media.vala
+++ b/src/installer-media.vala
@@ -82,7 +82,6 @@ private class Boxes.InstallerMedia : GLib.Object {
     }
 
     public virtual void set_direct_boot_params (DomainOs os) {}
-    // Returns true on success, false otherwise
     public virtual async bool prepare (ActivityProgress progress = new ActivityProgress (),
                                        Cancellable?     cancellable = null) {
         return true;