Remove TLSSocket (now in Mbed OS 5.11)

README.md

@@ -143,12 +143,21 @@ for (size_t ix = 0; ix < req->get_request_log_buffer_length(); ix++) {
 printf("\n");
 ```
 
+## Integration tests
+
+Integration tests are located in the `TESTS` folder and are ran through [Greentea](https://github.com/ARMmbed/greentea). Instructions on how to run the tests are in [http-example](https://os.mbed.com/teams/sandbox/code/http-example/).
+
+## Mbed OS 5.10 or lower
+
+If you want to use this library on Mbed OS 5.10 or lower, you need to add the [TLSSocket](https://github.com/ARMmbed/TLSSocket) library to your project. This library is included in Mbed OS 5.11 and up.
+
 ## Tested on
 
 * K64F with Ethernet.
 * NUCLEO_F411RE with ESP8266.
 * ODIN-W2 with WiFi.
 * K64F with Atmel 6LoWPAN shield.
+* DISCO-L475VG-IOT01A with WiFi.
 * [Mbed Simulator](https://github.com/janjongboom/mbed-simulator).
 
 But this should work with any Mbed OS 5 device that implements the `NetworkInterface` API.

TLSSocket.lib

-https://github.com/ARMmbed/TLSSocket/#7118d69699e6779dc5de519c75669e722bd78ba0