[doc]delete sql manual docs that mismatched of code in 2.0

[mongo360]

delete same mismatched sql manual doc of branch-2.0 in Database-Administration-Statements

[doris-robot]

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Since 2024-03-18, the Document has been moved to doris-website.
See Doris Document.

[zclllyybb]

actually the docs of doris has been moved to https://github.com/apache/doris-website, so your changes should be done in that repo. https://github.com/apache/doris-website/tree/master/versioned_docs/version-2.0 and https://github.com/apache/doris-website/tree/master/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.0. remember the siderbar.

[mongo360]

actually the docs of doris has been moved to https://github.com/apache/doris-website, so your changes should be done in that repo. https://github.com/apache/doris-website/tree/master/versioned_docs/version-2.0 and https://github.com/apache/doris-website/tree/master/i18n/zh-CN/docusaurus-plugin-content-docs/version-2.0. remember the siderbar.

@zclllyybb please review this one. apache/doris-website#707