Remove index confusing users

php-curl-class#550, php-curl-class#551

Author: zachborboa

examples/post_json_array_response.php

@@ -18,4 +18,4 @@
 $curl->setDefaultJsonDecoder($assoc = true);
 $curl->setHeader('Content-Type', 'application/json');
 $curl->post('https://httpbin.org/post', $data);
-var_dump($curl->response['json']);
+var_dump($curl->response);