[gnome-desktop] thumbnail: Simplify system includes

[Bastien Nocera <hadess src gnome org>]

commit 1c9cabf3accc02bab40c06d43acb2ea3688483b2
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Jul 11 11:15:45 2017 +0200

    thumbnail: Simplify system includes

 libgnome-desktop/gnome-desktop-thumbnail.c |   16 ++++------------
 1 files changed, 4 insertions(+), 12 deletions(-)
---
diff --git a/libgnome-desktop/gnome-desktop-thumbnail.c b/libgnome-desktop/gnome-desktop-thumbnail.c
index 18e4f8b..5645d39 100644
--- a/libgnome-desktop/gnome-desktop-thumbnail.c
+++ b/libgnome-desktop/gnome-desktop-thumbnail.c
@@ -127,23 +127,15 @@
  */
 
 #include <config.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <time.h>
-#include <math.h>
-#include <string.h>
-#include <glib.h>
-#include <stdio.h>
 
+#include <glib.h>
+#include <glib/gstdio.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
+#include <string.h>
+#include <stdlib.h>
 
 #define GNOME_DESKTOP_USE_UNSTABLE_API
 #include "gnome-desktop-thumbnail.h"
-#include <glib/gstdio.h>
 
 static void
 thumbnailers_directory_changed (GFileMonitor                 *monitor,