remove outdated link (#287)

Author: Chris Cho

source/fundamentals/data-formats/document-data-format-extended-json.txt

@@ -86,7 +86,6 @@ resources:
 
 - `JSON RFC <https://tools.ietf.org/html/rfc7159>`__ Official Documentation
 - :manual:`MongoDB Extended JSON </reference/mongodb-extended-json/>` Server Manual Entry
-- :manual:`Data Types in the mongo shell </core/shell-types/>` Server Manual Entry
 - `BsonBinary <{+api+}/apidocs/bson/org/bson/BsonBinary.html>`__ API Documentation
 - `Extended JSON specification <https://github.com/mongodb/specifications/blob/master/source/extended-json.rst>`__ GitHub Documentation