Revert "Added double-next reporting"

This reverts commit 4046ad0.

lib/http.js

@@ -133,7 +133,6 @@ Server.prototype.use = function(route, handle){
 Server.prototype.handle = function(req, res, out) {
   var writeHead = res.writeHead
     , stack = this.stack
-    , called = []
     , removed = ''
     , index = 0;
 
@@ -145,17 +144,6 @@ Server.prototype.handle = function(req, res, out) {
 
     layer = stack[index++];
 
-    // callback used to track
-    // and report double next()
-    function callback(err) {
-      if (~called.indexOf(layer.handle)) {
-        reportDoubleNext(layer.handle);
-      } else {
-        called.push(layer.handle);
-        next(err);
-      }
-    }
-
     // all done
     if (!layer) {
       // but wait! we have a parent
@@ -202,12 +190,12 @@ Server.prototype.handle = function(req, res, out) {
       var arity = layer.handle.length;
       if (err) {
         if (arity === 4) {
-          layer.handle(err, req, res, callback);
+          layer.handle(err, req, res, next);
         } else {
           next(err);
         }
       } else if (arity < 4) {
-        layer.handle(req, res, callback);
+        layer.handle(req, res, next);
       } else {
         next();
       }
@@ -221,25 +209,4 @@ Server.prototype.handle = function(req, res, out) {
     }
   }
   next();
-};
-
-/**
- * Report that the given `fn` was invoked
- * more than once. This _is_ an error, and
- * should be fixed in your application, however
- * this logic prevents the user from seeing
- * how node handles it via more obscure
- * errors such as: "Error: Can't set headers after they are sent."
- *
- * @param {Function} fn
- * @api private
- */
-
-function reportDoubleNext(fn) {
-  process.stderr.write('Error: the following middleware invoked next() more than once: ');
-  if (fn.name) {
-    console.error(fn.name + '()');
-  } else {
-    console.error('\n\n' + fn.toString() + '\n');
-  }
-}
+};