[gnome-system-monitor] Remove useless include

[Robert Roth <robertroth src gnome org>]

commit 358184f9adf6117d20e2cb5947583982a988822f
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Mon Jul 15 01:25:24 2013 +0300

    Remove useless include

 src/load-graph.cpp |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/load-graph.cpp b/src/load-graph.cpp
index 9a69840..1add603 100644
--- a/src/load-graph.cpp
+++ b/src/load-graph.cpp
@@ -9,7 +9,6 @@
 #include <dirent.h>
 #include <string.h>
 #include <time.h>
-#include <gdk/gdkx.h>
 
 #include <glib/gi18n.h>