message: Remove deprecated MONGODB-CR example
diff: @@ -76,21 +76,8 @@ auto client = mongocxx::client{
  ### MONGODB-CR
  -To explicitly create a credential of type MONGODB-CR use a connection
  -string as above but with a parameter specifying the authentication mechanism
  -as "MONGODB-CR":
  -
  -```cpp
  -#include <mongocxx/client.hpp>
  -#include <mongocxx/uri.hpp>
  -
  -auto client = mongocxx::client{
  - uri{"mongodb://user1:pwd1@host1/?authSource=db1&authMechanism=MONGODB-CR"}};
  -```
  -
  -Note that this is not recommended as a credential created in this way will
  -fail to authenticate after an authentication schema upgrade from
  -MONGODB-CR to SCRAM-SHA-1.
  +The MONGODB-CR authMechanism is deprecated and will no longer function in MongoDB 4.0. Instead, specify no authMechanism and the driver
  +will use an authentication mechanism compatible with your server.
  ### X.509
  