remove stdcxx namespace and use std directly
diff --git a/lib/cpp/test/AllProtocolTests.tcc b/lib/cpp/test/AllProtocolTests.tcc
index b6df656..a7eab07 100644
--- a/lib/cpp/test/AllProtocolTests.tcc
+++ b/lib/cpp/test/AllProtocolTests.tcc
@@ -28,7 +28,7 @@
 
 #include "GenericHelpers.h"
 
-using apache::thrift::stdcxx::shared_ptr;
+using std::shared_ptr;
 using namespace apache::thrift;
 using namespace apache::thrift::protocol;
 using namespace apache::thrift::transport;