some jshint cleanup

some more errors but whatever

lib/express.js

@@ -3,15 +3,12 @@
  */
 
 var EventEmitter = require('events').EventEmitter;
-
-var merge = require('merge-descriptors')
-  , mixin = require('utils-merge')
-
+var mixin = require('utils-merge');
 var proto = require('./application')
   , Route = require('./router/route')
   , Router = require('./router')
   , req = require('./request')
-  , res = require('./response')
+  , res = require('./response');
 
 /**
  * Expose `createApplication()`.

lib/request.js

@@ -149,7 +149,7 @@ req.acceptsCharsets = function(){
  */
 
 req.acceptsLanguage = // backwards compatibility
-req.acceptsLanguages = function(lang){
+req.acceptsLanguages = function(){
   var accept = accepts(this);
   return accept.languages.apply(accept, arguments);
 };

lib/response.js

@@ -13,7 +13,6 @@ var http = require('http')
   , statusCodes = http.STATUS_CODES
   , cookie = require('cookie')
   , send = require('send')
-  , resolve = require('url').resolve
   , basename = path.basename
   , extname = path.extname
   , mime = send.mime;

lib/router/index.js

@@ -22,7 +22,7 @@ var proto = module.exports = function(options) {
 
   function router(req, res, next) {
     router.handle(req, res, next);
-  };
+  }
 
   // mixin Router class functions
   router.__proto__ = proto;
@@ -199,8 +199,6 @@ proto.handle = function(req, res, done) {
         trim_prefix();
       });
 
-      return next(err);
-
       function trim_prefix() {
         var c = path[layer.path.length];
         if (c && '/' != c && '.' != c) return next(err);
@@ -244,7 +242,6 @@ proto.handle = function(req, res, done) {
  */
 
 proto.process_params = function(route, req, res, done) {
-  var self = this;
   var params = this.params;
 
   // captured parameters from the route, keys and values
@@ -288,7 +285,7 @@ proto.process_params = function(route, req, res, done) {
     }
 
     done();
-  };
+  }
 
   // single param callbacks
   function paramCallback(err) {

lib/router/layer.js

@@ -32,14 +32,16 @@ Layer.prototype.match = function(path){
     , params = this.params = {}
     , m = this.regexp.exec(path)
     , n = 0;
+  var key;
+  var val;
 
   if (!m) return false;
 
   for (var i = 1, len = m.length; i < len; ++i) {
-    var key = keys[i - 1];
+    key = keys[i - 1];
 
     try {
-      var val = 'string' == typeof m[i]
+      val = 'string' == typeof m[i]
         ? decodeURIComponent(m[i])
         : m[i];
     } catch(e) {