Modify docs 1129 v3

[jie-z-0607]

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PR changes

Docs

Description

1.删除./llm/config中各模型的README文件
2.将./llm/config各模型README中的信息更新至主页README，并删除主页README中指向已删除文件的超链接
3.删除./llm下README中的超链接

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