Removed no maintenance intended badge from readme

README.md

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 # PLEASE NOTE, THIS PROJECT HAS BEEN DEPRECATED
 
-[![No Maintenance Intended](http://unmaintained.tech/badge.svg)](http://unmaintained.tech/)
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 *`iotc-explorer` is soon to be retired, and has been replaced by the [Azure CLI IoT 
 Extension](https://aka.ms/iotcli).*