Replace all uses of BOOST_THROW_EXCEPTION with NDN_THROW

Refs: #4834
Change-Id: I6c536cd321fba62d397bf8520f51d2dbba73d908
diff --git a/tools/ndns-create-zone.cpp b/tools/ndns-create-zone.cpp
index e20b200..1238d4e 100644
--- a/tools/ndns-create-zone.cpp
+++ b/tools/ndns-create-zone.cpp
@@ -23,8 +23,8 @@
 #include "util/util.hpp"
 
 #include <boost/program_options.hpp>
-#include <boost/filesystem.hpp>
-#include <string>
+
+#include <iostream>
 
 NDNS_LOG_INIT(NdnsCreateZone);