removed version image in readme

Author: Nakul Sabharwal

README.md

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 # Microsoft Graph Auth SDK for Java
 
-[ ![Download](https://api.bintray.com/packages/microsoftgraph/Maven/microsoft-graph/images/download.svg) ](https://bintray.com/microsoftgraph/Maven/microsoft-graph/_latestVersion)
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 Get started with the Microsoft Graph SDK for Java by integrating the [Microsoft Graph API](https://graph.microsoft.io/en-us/getting-started) into your Java application!
 
 ## 1. Installation