Remove teacher_forcing_error_rate

Remove this condition related to teacher_forcing_error_rate as it is never used.

changed milestone to %DAN-P2: Clean code and remove unused code

added P2 label

added Quick Win label

assigned to @NolanB

mentioned in merge request !131 (merged)

By Nolan on 2023-05-17T13:57:27 (imported from GitLab)

closed