transformers

6ef16f2b - Remove Dependency between Bart and LED (slow/fast) (#19408)

Remove Dependency between Bart and LED (slow/fast) (#19408) * removed dependency from bart(slow) * removed dependency from bart(slow) * adding copying comments (copied from bart to led) * updated led docstring * updated led docstring * removed dependency from Bart (fast) * replaced bart with LED in docstrings * complying flake8 * added more copy comments * fixing copying comments * added comments back * fix copy comments * fixing copied from comments * fixing copied from comments