refactor($http): simplify buildUrl function

Author: pkozlowski-opensource

src/ng/http.js

@@ -1058,11 +1058,7 @@ function $HttpProvider() {
 
         forEach(value, function(v) {
           if (isObject(v)) {
-            if (isDate(v)){
-              v = v.toISOString();
-            } else if (isObject(v)) {
-              v = toJson(v);
-            }
+            v = isDate(v) ? v.toISOString() : toJson(v);
           }
           parts.push(encodeUriQuery(key) + '=' +
                      encodeUriQuery(v));