Update arduino-cloud-callbacks.md

Author: karlsoderby

content/arduino-cloud/01.getting-started/07.arduino-cloud-callbacks/arduino-cloud-callbacks.md

@@ -39,8 +39,4 @@ function whenever the `CONNECT` event occurs.
 
 The example below demonstrates how to use events & callbacks in the IoT Cloud. 
 
-<CodeBlock url="https://github.com/arduino-libraries/ArduinoIoTCloud/blob/master/examples/ArduinoIoTCloud-Callbacks/ArduinoIoTCloud-Callbacks.ino" className="arduino"/>
-
-## Summary
-
-This document covers the use of events & callbacks using the [ArduinoIoTCloud](https://github.com/arduino-libraries/ArduinoIoTCloud) library.
+<CodeBlock url="https://github.com/arduino-libraries/ArduinoIoTCloud/blob/master/examples/ArduinoIoTCloud-Callbacks/ArduinoIoTCloud-Callbacks.ino" className="arduino"/>