refactor($emplateRequest): simplify filtering out of transform functions

src/ng/templateRequest.js

@@ -28,14 +28,9 @@ function $TemplateRequestProvider() {
       var transformResponse = $http.defaults && $http.defaults.transformResponse;
 
       if (isArray(transformResponse)) {
-        var original = transformResponse;
-        transformResponse = [];
-        for (var i = 0; i < original.length; ++i) {
-          var transformer = original[i];
-          if (transformer !== defaultHttpResponseTransform) {
-            transformResponse.push(transformer);
-          }
-        }
+        transformResponse = transformResponse.filter(function(transformer) {
+          return transformer !== defaultHttpResponseTransform;
+        });
       } else if (transformResponse === defaultHttpResponseTransform) {
         transformResponse = null;
       }