transformers

a7e0ed82 - optimize VRAM for calculating pos_bias in LayoutLM v2, v3 (#26139)

optimize VRAM for calculating pos_bias in LayoutLM v2, v3 (#26139) * optimize layoutv2, v3 for VRAM saving * reformat codes --------- Co-authored-by: NormXU <xunuo@datagrand.com>