Intel Edison Getting started tutorial needs to be removed

[rukmanigopalan]

Talking to @liydu , Intel has discontinued support for Intel Edison toolkits, we still have the documentation alive on our Azure.com documentation, the following needs to be removed.

https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-intel-edison-kit-node-get-started
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-intel-edison-kit-c-get-started

[github-actions]

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