[mutter] Remove unused variable

[Florian Müllner <fmuellner src gnome org>]

commit a460f88b31010eeb6abfa77a9ddee2682370f7c6
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Oct 14 21:49:47 2014 +0200

    Remove unused variable

 src/core/screen.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/core/screen.c b/src/core/screen.c
index 86446e4..dbf3f60 100644
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -3022,7 +3022,6 @@ check_fullscreen_func (gpointer data)
 {
   MetaScreen *screen = data;
   MetaWindow *window;
-  GSList *tmp;
   GSList *fullscreen_monitors = NULL;
   GSList *obscured_monitors = NULL;
   gboolean in_fullscreen_changed = FALSE;