The old version of the MQL Model was implemented in Haskell and never fully completed. Our current plans are to replace the old version of the MQL Model with a new one that is primarily used for correctness testing purposes. Therefore, we should clean up some lingering code in the mongodb/mongo repo that relates to running tests against the old Haskell model.

We'll have to search for all the related code which can be removed, but a good place to start is with these files:

• https://github.com/mongodb/mongo/blob/master/jstests/libs/mql_model_mongod_test_runner.js
• https://github.com/mongodb/mongo/blob/master/buildscripts/resmokeconfig/suites/mql_model_mongod.yml
• https://github.com/mongodb/mongo/blob/master/buildscripts/resmokeconfig/suites/mql_model_haskell.yml
• https://github.com/mongodb/mongo/blob/master/buildscripts/resmokelib/testing/testcases/mql_model_mongod_test.py
• https://github.com/mongodb/mongo/blob/master/buildscripts/resmokelib/testing/testcases/mql_model_haskell_test.py