Common App question re: recommenders

My D assigned a teacher recommender for a couple schools that don’t require one. Will the school consider the application incomplete if there is an outstanding but optional recommendation and all other parts of the application are in? Should she just remove the recommender so she doesn’t have to worry about the teacher getting done? These are B+ type schools so I doubt a positive history teacher recommendation will tilt the scales drastically.

Oops. Should have put under Common App subgroup. Sorry

If the teacher LoR is optional, sending one only doesn’t get you rejected.