Fix batch size handling in prediction_loop for DataLoaderShard (#34343)
* Fix batch size handling in prediction_loop for DataLoaderShard
Updated the prediction_loop method in the Trainer class to correctly handle batch size when using DataLoaderShard. This ensures that the batch size is retrieved from total_batch_size for distributed training scenarios, preventing TypeError related to NoneType during evaluation.
* Update src/transformers/trainer.py
Co-authored-by: Zach Mueller <muellerzr@gmail.com>
* Applied the fix to remove unused imports
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Co-authored-by: Zach Mueller <muellerzr@gmail.com>