Removing the training url since it is no longer in place.

Author: anu3990

README.md

@@ -89,7 +89,6 @@ db.createCollection(
 
 * [Node.js Client API Documentation](https://docs.marklogic.com/jsdoc/index.html)
 * [Node.js Application Developer's Guide](http://docs.marklogic.com/guide/node-dev)
-* [MarkLogic Training for the Node.js Client API](http://www.marklogic.com/training-courses/developing-marklogic-applications-i-node-js/)
 
 ### Code Examples