[gtk+] docs: remove unused objects_grouped.sgml

[Will Thompson <wjt src gnome org>]

commit 678ccd6fc1d8872d9084d3bbb91d277072ba5310
Author: Will Thompson <will willthompson co uk>
Date:   Sat May 18 14:55:32 2013 +0100

    docs: remove unused objects_grouped.sgml
    
    I notice that a reference to GtkStrengthBar had been left in this file
    when it was renamed to GtkLevelBar. On closer inspection, it looks like
    it's been unused for 13 years. To quote docs/reference/ChangeLog:
    
    > 2000-10-23  Havoc Pennington  <hp redhat com>
    >
    > [...] Removed objects_grouped.sgml from gtk-docs.sgml for now, it
    > doesn't seem useful anymore.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=700575

 docs/reference/gtk/Makefile.am          |    1 -
 docs/reference/gtk/objects_grouped.sgml |  141 -------------------------------
 2 files changed, 0 insertions(+), 142 deletions(-)
---
diff --git a/docs/reference/gtk/Makefile.am b/docs/reference/gtk/Makefile.am
index 1b0c7a0..47467f6 100644
--- a/docs/reference/gtk/Makefile.am
+++ b/docs/reference/gtk/Makefile.am
@@ -141,7 +141,6 @@ content_files =                                     \
        migrating-smclient-GtkApplication.xml   \
        migrating-GtkGrid.xml                   \
        migrating-GtkStyleContext.xml           \
-       objects_grouped.sgml                    \
        osx.sgml                                \
        broadway.xml                            \
        wayland.xml                             \