docs: don't include the type hierarchy

gtk-doc can't generate a type hierarchy when scanning gst-libav, and gtk-doc
1.30 onwards doesn't write a file if there is no type hierarchy (unlike previous
releases, which wrote an empty file).  This results in the build failing with
gtk-doc 1.30 onwards, so remove the type hierarchy section from the
documentation as it doesn't serve any purpose.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-libav/issues/57

diff --git a/docs/plugins/gst-libav-plugins-docs.sgml b/docs/plugins/gst-libav-plugins-docs.sgml
index 75c68f4..f68d554 100644 (file)
--- a/docs/plugins/gst-libav-plugins-docs.sgml
+++ b/docs/plugins/gst-libav-plugins-docs.sgml
@@ -32,9 +32,4 @@
     <title>gst-libav Plugins</title>
     <xi:include href="xml/plugin-libav.xml" />
   </chapter>
-
-  <chapter>
-    <title>Object Hierarchy</title>
-    <xi:include href="xml/tree_index.sgml" />
-  </chapter>
 </book>