clean up autoconf of unordered_xx, prepare change to shared_ptr

src/rcldb/rclabstract.cpp

@@ -19,9 +19,6 @@
 #include <math.h>
 
 #include <map>
-#include "unordered_defs.h"
-
-using namespace std;
 
 #include "debuglog.h"
 #include "rcldb.h"
@@ -33,6 +30,8 @@ using namespace std;
 #include "utf8iter.h"
 #include "hldata.h"
 
+using namespace std;
+
 namespace Rcl {
 // This is used as a marker inside the abstract frag lists, but
 // normally doesn't remain in final output (which is built with a