cleanup cruise control knob

Summary:
- cleanup cruise control knob as it's fully rolled out
- add some comments

Reviewed By: Acesine

Differential Revision: D59076184

fbshipit-source-id: c20f951b26b48205176003a92d81100bb2a26b79

td_util/src/supertd_events.rs

@@ -35,8 +35,6 @@ pub enum Event {
     VERIFIABLE_MATCHER_SUCCESS,
     VERSE_SUCCESS,
     BUILD_DIRECTIVES_SPECIFIED,
-    VERSE_SANDCASTLE_CRUISECONTROL,
-    VERSE_MLX_CRUISEONTROL,
 }
 
 /// Initialize the Scuba client for the `supertd_events` dataset.