[gnome-calendar] source-dialog: remove needless placeholder

[Erick Pérez Castellanos <erickpc src gnome org>]

commit facb1fb1fc3a8e12fa965312878720550aa71b78
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Mar 24 22:50:39 2015 -0300

    source-dialog: remove needless placeholder

 data/ui/source-dialog.ui |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)
---
diff --git a/data/ui/source-dialog.ui b/data/ui/source-dialog.ui
index 299828d..510e7b0 100644
--- a/data/ui/source-dialog.ui
+++ b/data/ui/source-dialog.ui
@@ -405,9 +405,6 @@
         </child>
       </object>
     </child>
-    <child type="label_item">
-      <placeholder/>
-    </child>
     <style>
       <class name="details-frame"/>
     </style>