revert: fix(Angular.js): toKeyValue is not serializing null values

This commit contained broken tests and was not ready to be merged.

(reverted from commit 814c984)

Author: petebacondarwin

src/Angular.js

@@ -1062,16 +1062,14 @@ function parseKeyValue(/**string*/keyValue) {
 function toKeyValue(obj) {
   var parts = [];
   forEach(obj, function(value, key) {
-    if (value !== null) {
-      if (isArray(value)) {
-        forEach(value, function(arrayValue) {
-          parts.push(encodeUriQuery(key, true) +
-                     (arrayValue === true ? '' : '=' + encodeUriQuery(arrayValue, true)));
-        });
-      } else {
+    if (isArray(value)) {
+      forEach(value, function(arrayValue) {
         parts.push(encodeUriQuery(key, true) +
-                   (value === true ? '' : '=' + encodeUriQuery(value, true)));
-      }
+                   (arrayValue === true ? '' : '=' + encodeUriQuery(arrayValue, true)));
+      });
+    } else {
+    parts.push(encodeUriQuery(key, true) +
+               (value === true ? '' : '=' + encodeUriQuery(value, true)));
     }
   });
   return parts.length ? parts.join('&') : '';

test/AngularSpec.js

@@ -491,14 +491,6 @@ describe('angular', function() {
       expect(toKeyValue({key: [323,'value',true, 1234]})).
       toEqual('key=323&key=value&key&key=1234');
     });
-
-    it('should not serialize null values', function() {
-      expect(toKeyValue({nullKey: null, key: 'value'})).toEqual('key=value');
-    });
-
-    it('should not serialize undefined', function() {
-      expect(toKeyValue({undefinedKey: undefined, key: 'value'})).toEqual('key=value');
-    });
   });