Description: remove include to fix FTBFS with newer libsigc++

Author: Logan Rosen <logan@ubuntu.com>

Forwarded: no

Last-Update: 2016-01-05

---

This patch header follows DEP-3: http://dep.debian.net/deps/dep3/

--- a/src/dispatcher.h

+++ b/src/dispatcher.h

@@ -23,7 +23,6 @@

 #ifndef HAVE_DISPATCHER_H

 #define HAVE_DISPATCHER_H

-#include <sigc++/class_slot.h>

 #include "gui_mainwindow.h"

 #include "lib_ipv4.h"