transformers

94b57bf7 - [TF 2.2 compat] use tf.VariableAggregation.ONLY_FIRST_REPLICA (#4283)

[TF 2.2 compat] use tf.VariableAggregation.ONLY_FIRST_REPLICA (#4283) * Fix the issue to properly run the accumulator with TF 2.2 * Apply style * Fix training_args_tf for TF 2.2 * Fix the TF training args when only one GPU is available * Remove the fixed version of TF in setup.py