remove _null and _undefined

they have no significant effect on minified and gziped size. in fact
they make things worse.

file        | before     | after removal
----------------------------------------
concat      | 325415     | 325297
min         | 62070      | 62161
min + gzip  | 25187      | 25176

The bottom line is that we are getting 0.05% decrease in size after
gzip without all of the hassle of using underscores everywhere.

7 files changed, 10 insertions, 10 deletions

diff --git a/src/service/cookies.js b/src/service/cookies.js
index b8de81c2..86e55fc1 100644
--- a/src/service/cookies.js
+++ b/src/service/cookies.js
@@ -52,7 +52,7 @@ angularServiceInject('$cookies', function($browser) {
     //delete any cookies deleted in $cookies
     for (name in lastCookies) {
       if (isUndefined(cookies[name])) {
-        $browser.cookies(name, _undefined);
+        $browser.cookies(name, undefined);
       }
     }
 
diff --git a/src/service/hover.js b/src/service/hover.js
index a7cef71a..fca18130 100644
--- a/src/service/hover.js
+++ b/src/service/hover.js
@@ -50,7 +50,7 @@ angularServiceInject("$hover", function(browser, document) {
       }
     } else if (tooltip) {
       tooltip.callout.remove();
-      tooltip = _null;
+      tooltip = null;
     }
   });
 }, ['$browser', '$document'], true);
diff --git a/src/service/location.js b/src/service/location.js
index 31323284..a5875b72 100644
--- a/src/service/location.js
+++ b/src/service/location.js
@@ -199,7 +199,7 @@ angularServiceInject("$location", function($browser) {
    */
   function composeHref(loc) {
     var url = toKeyValue(loc.search);
-    var port = (loc.port == DEFAULT_PORTS[loc.protocol] ? _null : loc.port);
+    var port = (loc.port == DEFAULT_PORTS[loc.protocol] ? null : loc.port);
 
     return loc.protocol  + '://' + loc.host +
           (port ? ':' + port : '') + loc.path +
@@ -233,7 +233,7 @@ angularServiceInject("$location", function($browser) {
       loc.href = href.replace(/#$/, '');
       loc.protocol = match[1];
       loc.host = match[3] || '';
-      loc.port = match[5] || DEFAULT_PORTS[loc.protocol] || _null;
+      loc.port = match[5] || DEFAULT_PORTS[loc.protocol] || null;
       loc.path = match[6] || '';
       loc.search = parseKeyValue(match[8]);
       loc.hash = match[10] || '';
diff --git a/src/service/route.js b/src/service/route.js
index 2de484f6..19fc81bf 100644
--- a/src/service/route.js
+++ b/src/service/route.js
@@ -196,14 +196,14 @@ angularServiceInject('$route', function(location, $updateView) {
       });
       if (dstName) this.$set(dstName, dst);
     }
-    return match ? dst : _null;
+    return match ? dst : null;
   }
 
 
   function updateRoute(){
     var childScope, routeParams, pathParams, segmentMatch, key, redir;
 
-    $route.current = _null;
+    $route.current = null;
     forEach(routes, function(rParams, rPath) {
       if (!pathParams) {
         if (pathParams = matcher(location.hashPath, rPath)) {
@@ -213,7 +213,7 @@ angularServiceInject('$route', function(location, $updateView) {
     });
 
     // "otherwise" fallback
-    routeParams = routeParams || routes[_null];
+    routeParams = routeParams || routes[null];
 
     if(routeParams) {
       if (routeParams.redirectTo) {
diff --git a/src/service/xhr.bulk.js b/src/service/xhr.bulk.js
index 9933aa7e..c6cf608c 100644
--- a/src/service/xhr.bulk.js
+++ b/src/service/xhr.bulk.js
@@ -16,7 +16,7 @@ angularServiceInject('$xhr.bulk', function($xhr, $error, $log){
   function bulkXHR(method, url, post, callback) {
     if (isFunction(post)) {
       callback = post;
-      post = _null;
+      post = null;
     }
     var currentQueue;
     forEach(bulkXHR.urls, function(queue){
diff --git a/src/service/xhr.cache.js b/src/service/xhr.cache.js
index e87b127b..284321d7 100644
--- a/src/service/xhr.cache.js
+++ b/src/service/xhr.cache.js
@@ -26,7 +26,7 @@ angularServiceInject('$xhr.cache', function($xhr, $defer, $log){
   function cache(method, url, post, callback, verifyCache){
     if (isFunction(post)) {
       callback = post;
-      post = _null;
+      post = null;
     }
     if (method == 'GET') {
       var data, dataCached;
diff --git a/src/service/xhr.js b/src/service/xhr.js
index 1de72b22..18f695e6 100644
--- a/src/service/xhr.js
+++ b/src/service/xhr.js
@@ -129,7 +129,7 @@ angularServiceInject('$xhr', function($browser, $error, $log, $updateView){
   return function(method, url, post, callback){
     if (isFunction(post)) {
       callback = post;
-      post = _null;
+      post = null;
     }
     if (post && isObject(post)) {
       post = toJson(post);