Delete link in iBeacon.md

Delete broken link, so engine can build.

Author: Amanda Butler

docs/reference/api/connectivity/bluetooth/iBeacon.md

@@ -8,8 +8,6 @@ The iBeacon class builds an advertising payload mimicking an iBeacon and assigns
 
 ### iBeacon class reference
 
-[![View code](https://www.mbed.com/embed/?type=library)](https://os-doc-builder.test.mbed.com/docs/v5.7/mbed-os-api-doxy/classi_beacon.html)
-
 ### iBeacon example
 
 [![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Beacon/)](https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-ble-Beacon/file/863f3fea9978/source/main.cpp)