remove unused headers
diff --git a/lib/cpp/src/thrift/concurrency/Monitor.h b/lib/cpp/src/thrift/concurrency/Monitor.h
index 2399a98..11a145d 100644
--- a/lib/cpp/src/thrift/concurrency/Monitor.h
+++ b/lib/cpp/src/thrift/concurrency/Monitor.h
@@ -20,15 +20,9 @@
#ifndef _THRIFT_CONCURRENCY_MONITOR_H_
#define _THRIFT_CONCURRENCY_MONITOR_H_ 1
-#ifdef HAVE_SYS_TIME_H
-#include <sys/time.h>
-#endif
-
#include <thrift/concurrency/Exception.h>
#include <thrift/concurrency/Mutex.h>
-#include <boost/utility.hpp>
-
namespace apache {
namespace thrift {
namespace concurrency {
diff --git a/lib/cpp/src/thrift/concurrency/Thread.h b/lib/cpp/src/thrift/concurrency/Thread.h
index cacd401..f8a3f51 100644
--- a/lib/cpp/src/thrift/concurrency/Thread.h
+++ b/lib/cpp/src/thrift/concurrency/Thread.h
@@ -20,11 +20,9 @@
#ifndef _THRIFT_CONCURRENCY_THREAD_H_
#define _THRIFT_CONCURRENCY_THREAD_H_ 1
-#include <stdint.h>
#include <memory>
#include <thread>
-#include <thrift/thrift-config.h>
#include <thrift/concurrency/Monitor.h>
namespace apache {
diff --git a/lib/cpp/src/thrift/concurrency/TimerManager.h b/lib/cpp/src/thrift/concurrency/TimerManager.h
index e09ecf2..4e291e3 100644
--- a/lib/cpp/src/thrift/concurrency/TimerManager.h
+++ b/lib/cpp/src/thrift/concurrency/TimerManager.h
@@ -20,7 +20,6 @@
#ifndef _THRIFT_CONCURRENCY_TIMERMANAGER_H_
#define _THRIFT_CONCURRENCY_TIMERMANAGER_H_ 1
-#include <thrift/concurrency/Exception.h>
#include <thrift/concurrency/Monitor.h>
#include <thrift/concurrency/ThreadFactory.h>