transformers

3ce3385c - Revert "Fix gradient checkpointing + fp16 autocast for most models" (#24420)

Revert "Fix gradient checkpointing + fp16 autocast for most models" (#24420) Revert "Fix gradient checkpointing + fp16 autocast for most models (#24247)" This reverts commit 285a48011da3145ae77c5b22bcfbe77d367e5173.