[gtkmm] demo: Remove unused stock browser example

[Murray Cumming <murrayc src gnome org>]

commit 3485de2b4722e67af717e7e05b5b3d909196bf12
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Sep 26 12:02:02 2013 +0200

    demo: Remove unused stock browser example

 demos/Makefile.am                      |    4 +-
 demos/gtk-demo/example_stockbrowser.cc |  279 --------------------------------
 2 files changed, 1 insertions(+), 282 deletions(-)
---
diff --git a/demos/Makefile.am b/demos/Makefile.am
index ac86cad..4fdee66 100644
--- a/demos/Makefile.am
+++ b/demos/Makefile.am
@@ -49,9 +49,7 @@ gtk_demo_gtkmm_demo_SOURCES =                         \
        gtk-demo/textwidget.h
 
 ## These demos use deprecated API.
-## example_icontheme.cc is approximately a replacement for example_stockbrowser.cc.
-## example_uimanager.cc should be replaced by a Gtk::Builder demo.
-## gtk-demo/example_stockbrowser.cc            \
+## example_uimanager.cc should be replaced by a Gtk::Builder demo.             \
 ## gtk-demo/example_uimanager.cc                       \
 
 dist_noinst_DATA =                     \