transformers

12ee21d1 - [`feat`] Allow untying `hidden_states[-1]` from `last_hidden_state` via the model config (#48087)

[`feat`] Allow untying `hidden_states[-1]` from `last_hidden_state` via the model config (#48087) * [`feat`] Allow untying `hidden_states[-1]` from `last_hidden_state` via the model config * Simplify tie_last_hidden_states docs in PreTrainedConfig * Just check that norm(untied[-1]) == tied[-1]