[mutter] compositor: Remove atom_x_root_pixmap

[Jasper St. Pierre <jstpierre src gnome org>]

commit 93a89332827d295bd9ca8b4057a91797fba3e5f4
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Dec 6 13:34:08 2013 -0500

    compositor: Remove atom_x_root_pixmap
    
    It's unused
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720106

 src/compositor/compositor-private.h |    1 -
 src/compositor/compositor.c         |    4 +---
 2 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/src/compositor/compositor-private.h b/src/compositor/compositor-private.h
index 0ebf3a4..494a77b 100644
--- a/src/compositor/compositor-private.h
+++ b/src/compositor/compositor-private.h
@@ -17,7 +17,6 @@ struct _MetaCompositor
 {
   MetaDisplay    *display;
 
-  Atom            atom_x_root_pixmap;
   Atom            atom_net_wm_window_opacity;
   guint           repaint_func_id;
 
diff --git a/src/compositor/compositor.c b/src/compositor/compositor.c
index daddf77..9e36382 100644
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -1509,7 +1509,6 @@ MetaCompositor *
 meta_compositor_new (MetaDisplay *display)
 {
   char *atom_names[] = {
-    "_XROOTPMAP_ID",
     "_NET_WM_WINDOW_OPACITY",
   };
   Atom                   atoms[G_N_ELEMENTS(atom_names)];
@@ -1535,8 +1534,7 @@ meta_compositor_new (MetaDisplay *display)
                     G_CALLBACK (on_shadow_factory_changed),
                     compositor);
 
-  compositor->atom_x_root_pixmap = atoms[0];
-  compositor->atom_net_wm_window_opacity = atoms[1];
+  compositor->atom_net_wm_window_opacity = atoms[0];
 
   compositor->repaint_func_id = clutter_threads_add_repaint_func (meta_repaint_func,
                                                                   compositor,