Delete packages.md
Delete packages.md

This file is no longer needed and was deleted in https://github.com/Azure/azure-sdk-for-java/pull/6672 but accidentally added back in https://github.com/Azure/azure-sdk-for-java/pull/6662
Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,selvasingh/azure-sdk-for-java