Remove beta docs and point to the official documentation.

Author: rozza

docs/README.md

@@ -1,14 +1,3 @@
 # MongoDB Kafka Connector
 
-The official MongoDB Kafka Connector.
-
-  - The sink connector can store data from Kafka topics into MongoDB.
-  - The source connector can watch data changes from MongoDB and publish them onto Kafka topics.
-
-## Table of Contents
-
-- [Installation guide](./install.md)
-- [The MongoDB Kafka sink connector guide](./sink.md)
-- [The MongoDB Kafka source connector guide](./source.md)
-- [A docker end 2 end example](../docker/README.md)
-- [Changelog](./changelog.md)
+For more information on the official MongoDB Kafka Connector, see the [official documentation]( https://docs.mongodb.com/kafka-connector/current/).