Remove classic-dra codes

[cyclinder]

Thanks for contributing!

Notice:

• [ ] unite test or E2E test
• [ ] do not forget essential code comment and log
• [ ] document for the PR
• [ ] release note label "release/none" "release/bug" "release/feature"
• [ ] read about Contribution notice: https://spidernet-io.github.io/spiderpool/latest/develop/contributing/

What issue(s) does this PR fix:

Fixes #

Special notes for your reviewer: