Documentation detail in (TF)RobertaForSequenceClassification 
# ❓ Questions & Help
The documetation for TFRobertaForSequenceClassification lacks a description for the `labels` parameter. That is not the case for RobertaForSequenceClassification. The parameters actually exists for the TF version and the documentation causes a little confusion. Not sure where to post this in the forum.

## Details
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I see that the  docstring for these classes comes from the variable `ROBERTA_INPUTS_DOCSTRING` in the [source](https://huggingface.co/transformers/_modules/transformers/modeling_roberta.html#RobertaForSequenceClassification) and the doc for labels is added after that on the pytorch model, but not on the tf model.
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