removed sharding section from scaling topic per reza and GH issue

Author: JimacoMS3

articles/iot-hub/iot-hub-scaling.md

@@ -123,10 +123,6 @@ For specific burst performance numbers, see [IoT Hub quotas and throttles](iot-h
 
 If you are approaching the allowed message limit on your IoT Hub, you can use these [steps to automatically scale](https://azure.microsoft.com/resources/samples/iot-hub-dotnet-autoscale/) to increment an IoT Hub unit in the same IoT Hub tier.
 
-## Sharding
-
-While a single IoT hub can scale to millions of devices, sometimes your solution requires specific performance characteristics that a single IoT hub cannot guarantee. In that case, you can partition your devices across multiple IoT hubs. Multiple IoT hubs smooth traffic bursts and obtain the required throughput or operation rates that are required.
-
 ## Next steps
 
 * For more information about IoT Hub capabilities and performance details, see [IoT Hub pricing](https://azure.microsoft.com/pricing/details/iot-hub) or [IoT Hub quotas and throttles](iot-hub-devguide-quotas-throttling.md).