The gdk-pixbuf-xlib headers are not actually used

--- a/panel/plugin.c	2010-02-09 06:05:39.000000000 -0600
+++ b/panel/plugin.c	2015-06-17 11:31:00.595529234 -0500
@@ -2,7 +2,6 @@
 #include "plugin.h"
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
-#include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h>
 #include <gdk/gdk.h>
 #include <string.h>
 #include <stdlib.h>
--- a/plugins/icons/icons.c	2010-04-25 02:58:35.000000000 -0500
+++ b/plugins/icons/icons.c	2015-06-17 11:31:11.412538586 -0500
@@ -8,7 +8,6 @@
 //#include <X11/xpm.h>
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
-#include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h>
 #include <gdk/gdk.h>
 
 
--- a/plugins/taskbar/taskbar.c	2010-05-12 14:28:58.000000000 -0500
+++ b/plugins/taskbar/taskbar.c	2015-06-17 11:31:23.504666921 -0500
@@ -8,7 +8,6 @@
 //#include <X11/xpm.h>
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
-#include <gdk-pixbuf-xlib/gdk-pixbuf-xlib.h>
 #include <gdk/gdk.h>