fix: torch.dropout与 paddle.nn.functional.dropout的映射关系有问题

[JiwaniZakir]

Fixes #7328

The mapping document torch.dropout.md incorrectly classified torch.dropout and paddle.nn.functional.dropout as having only parameter name differences, when the two APIs have broader functional and behavioral differences that cannot be accurately described by this simplified mapping. Removes the incorrect file from docs/guides/model_convert/convert_from_pytorch/api_difference/args_name_diff/ to prevent users from following misleading migration guidance.

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[Copilot]

Pull request overview

该 PR 修正文档中关于 torch.dropout 与 paddle.nn.functional.dropout 的错误映射说明：原文档将两者误归类为“仅参数名不一致”，但实际上两者在 API 属性/语义层面存在更大差异，继续保留会误导迁移用户，因此直接移除该映射文档以避免错误指引。

Changes:

• 删除错误的映射文档 torch.dropout.md（原放置在 args_name_diff/ 分类下），避免用户按错误结论进行迁移。

[luotao1]

Please sign the CLA.

[zhwesky2010]

无需修改，目前torch.dropout与paddle.nn.functional.dropout两者用法存在不一致，需保留映射文档。可尝试对齐两者用法后，再删除文档。