transformers

21e259d8 - Fix training speed regression introduced by "optimize VRAM for calculating pos_bias in LayoutLM v2, v3 (#26139)" (#30988)

Fix training speed regression introduced by "optimize VRAM for calculating pos_bias in LayoutLM v2, v3 (#26139)" (#30988) * Revert "optimize VRAM for calculating pos_bias in LayoutLM v2, v3 (#26139)" This reverts commit a7e0ed829c398a67a641a401e23dae13e2f8b217. * Instead of reverting commit, wrap indexing in torch.no_grad context * Apply wrapping in LayoutLMv2 * Add comments explaining reason for no_grad * Fix code format --------- Co-authored-by: Kevin Koehncke <kevin.koehncke@uipath.com>