Update README.md

Author: lpatino10

assistant/README.md

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 # Assistant
 
-## Note about Assistant v2
-This service is currently in **private beta** and requires access to use. To learn more and find out how to get access, please read [here](https://www.ibm.com/blogs/watson/2018/03/the-future-of-watson-conversation-watson-assistant/).
-
 ## Installation
 
 ##### Maven