Split synchronization mechanisms from util.{h,cpp}

src/qt/messagepage.cpp

@@ -10,7 +10,6 @@
 #include "main.h"
 #include "wallet.h"
 #include "init.h"
-#include "util.h"
 
 #include "messagepage.h"
 #include "ui_messagepage.h"

src/qt/qtipcserver.cpp

@@ -8,7 +8,6 @@
 #include <boost/date_time/posix_time/posix_time.hpp>
 
 #include "ui_interface.h"
-#include "util.h"
 #include "qtipcserver.h"
 
 using namespace boost::interprocess;