[dconf-editor] Don't duplicate code.

[Arnaud Bonatti <arnaudb src gnome org>]

commit defc7408ead21a498a204eac4dde84c58beace82
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Sep 21 12:11:57 2015 +0200

    Don't duplicate code.

 editor/dconf-model.vala |   10 +---------
 1 files changed, 1 insertions(+), 9 deletions(-)
---
diff --git a/editor/dconf-model.vala b/editor/dconf-model.vala
index 91f375b..062f392 100644
--- a/editor/dconf-model.vala
+++ b/editor/dconf-model.vala
@@ -137,15 +137,7 @@ public class Key : GLib.Object
         if (!has_schema)
             return;
 
-        _value = null;
-        try
-        {
-            model.client.write_sync(full_name, null);
-        }
-        catch (GLib.Error e)
-        {
-        }
-        value_changed();
+        value = null;
     }
 
     private void update_value()