[gnome-builder] gsettings: mark gsetting as unused

[Christian Hergert <chergert src gnome org>]

commit b0af3aa241036a038343ebc4491b7683e3f1f5fd
Author: Christian Hergert <chergert redhat com>
Date:   Thu Feb 14 11:54:27 2019 -0800

    gsettings: mark gsetting as unused

 data/gsettings/org.gnome.builder.project-tree.gschema.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/gsettings/org.gnome.builder.project-tree.gschema.xml 
b/data/gsettings/org.gnome.builder.project-tree.gschema.xml
index 80bc514b9..b9ddc7389 100644
--- a/data/gsettings/org.gnome.builder.project-tree.gschema.xml
+++ b/data/gsettings/org.gnome.builder.project-tree.gschema.xml
@@ -3,7 +3,7 @@
     <key name="show-icons" type="b">
       <default>true</default>
       <summary>Show Icons</summary>
-      <description>If enabled, the project tree will display icons next to each item.</description>
+      <description>This setting is deprecated and no longer in use.</description>
     </key>
     <key name="show-ignored-files" type="b">
       <default>false</default>