QPID-7146: Remove (via preprocessor) unused code

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1735326 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/qpid/cpp/src/qpid/broker/DtxManager.cpp b/qpid/cpp/src/qpid/broker/DtxManager.cpp
index 4fb82bb..61dfad2 100644
--- a/qpid/cpp/src/qpid/broker/DtxManager.cpp
+++ b/qpid/cpp/src/qpid/broker/DtxManager.cpp
@@ -38,6 +38,7 @@
 using namespace qpid::broker;
 using namespace qpid::framing;
 
+#if DEFINE_UNUSED
 namespace {
     typedef boost::function0<void> FireFunction;
     struct DtxCleanup : public qpid::sys::TimerTask
@@ -61,6 +62,7 @@
     }
 
 }
+#endif
 
 DtxManager::DtxManager(qpid::sys::Timer& t, uint32_t _dtxDefaultTimeout) :
     store(0),