[gtk/ebassi/gidocgen] treemodel: Add a summary

[Matthias Clasen <matthiasc src gnome org>]

commit 2744c4596edb8a980d528802dd2589bed870c75a
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Mar 1 22:50:14 2021 -0500

    treemodel: Add a summary

 gtk/gtktreemodel.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtktreemodel.c b/gtk/gtktreemodel.c
index a330643f45..a7e6b5ce16 100644
--- a/gtk/gtktreemodel.c
+++ b/gtk/gtktreemodel.c
@@ -28,12 +28,9 @@
 #include "gtkintl.h"
 
 /**
- * SECTION:gtktreemodel
- * @Title: GtkTreeModel
- * @Short_description: The tree interface used by GtkTreeView
- * @See_also: #GtkTreeView, #GtkTreeStore, #GtkListStore,
- *     [GtkTreeView drag-and-drop][gtk4-GtkTreeView-drag-and-drop]
- *     #GtkTreeSortable
+ * GtkTreeModel:
+ *
+ * The tree interface used by GtkTreeView
  *
  * The #GtkTreeModel interface defines a generic tree interface for
  * use by the #GtkTreeView widget. It is an abstract interface, and