[ekiga] Remove some unused #include

[Eugen Dedu <ededu src gnome org>]

commit 931760ec0566e75e133615e0de5532a9202377bf
Author: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
Date:   Fri Jan 25 20:46:55 2013 +0100

    Remove some unused #include

 .../components/call-history/history-book.cpp       |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)
---
diff --git a/lib/engine/components/call-history/history-book.cpp b/lib/engine/components/call-history/history-book.cpp
index 4f23e55..44e5d11 100644
--- a/lib/engine/components/call-history/history-book.cpp
+++ b/lib/engine/components/call-history/history-book.cpp
@@ -33,16 +33,9 @@
  *
  */
 
-#include <iostream>
-#include <sstream>
-#include <set>
-
 #include "config.h"
-
 #include <glib/gi18n.h>
-
 #include "gmconf.h"
-
 #include "history-book.h"
 
 History::Book::Book (Ekiga::ServiceCore& core):