fix(ci): Remove unused files to avoid disk full

[shino]

cf.

• https://zenn.dev/pinto0309/scraps/c6413eb15a1b2a (in Japanese)
• https://github.com/actions/runner-images/issues/709

If this Pull Request is work in progress, Add a prefix of “[WIP]” in the title.

What did you implement:

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Fixes # (issue)

Type of change

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• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

• https://github.com/future-architect/vuls/actions/runs/9432941692/job/25983315399
• actions executed in the debug branch https://github.com/future-architect/vuls/compare/master...shino/debug-release

Checklist:

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• [ ] Write tests
• [ ] Write documentation
• [x] Check that there aren't other open pull requests for the same issue/feature
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• [ ] Pass the test by make test
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• [x] Update the messages below

Is this ready for review?: YES

Reference

• https://blog.github.com/2015-01-21-how-to-write-the-perfect-pull-request/