Description: Fix empty tree_index files not being built anymore.
Author: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

--- a/docs/libdbusmenu-glib/reference/libdbusmenu-glib-docs.sgml
+++ b/docs/libdbusmenu-glib/reference/libdbusmenu-glib-docs.sgml
@@ -18,10 +18,6 @@
     <xi:include href="xml/types.xml"/>
 
   </chapter>
-  <chapter id="object-tree">
-    <title>Object Hierarchy</title>
-     <xi:include href="xml/tree_index.sgml"/>
-  </chapter>
   <index id="api-index-full">
     <title>API Index</title>
     <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>
--- a/docs/libdbusmenu-gtk/reference/libdbusmenu-gtk-docs.sgml
+++ b/docs/libdbusmenu-gtk/reference/libdbusmenu-gtk-docs.sgml
@@ -17,10 +17,6 @@
     <xi:include href="xml/parser.xml"/>
 
   </chapter>
-  <chapter id="object-tree">
-    <title>Object Hierarchy</title>
-     <xi:include href="xml/tree_index.sgml"/>
-  </chapter>
   <index id="api-index-full">
     <title>API Index</title>
     <xi:include href="xml/api-index-full.xml"><xi:fallback /></xi:include>