remove GUID link (#348)

Author: jordan-smith721

source/fundamentals/serialization/guid-serialization.txt

@@ -222,7 +222,6 @@ To learn more about any of the methods or types discussed in this
 guide, see the following API documentation:
 
 - `BsonBinaryData <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.BsonBinaryData.html>`__
-- `GuidRepresentationMode <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.GuidRepresentationMode.html>`__
 - `BsonGuidRepresentation <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.Serialization.Attributes.BsonGuidRepresentationAttribute.html>`__
 - `GuidSerializer <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.Serialization.Serializers.GuidSerializer.html>`__
 - `ObjectSerializer <{+new-api-root+}/MongoDB.Bson/MongoDB.Bson.Serialization.Serializers.ObjectSerializer.html>`__