Revert "Commit generated code automatically"

[Yang-33]

Reverts line/line-bot-sdk-php#523

github acitons doesn't support push to change to protected branch...

• https://github.com/orgs/community/discussions/25305
• https://github.com/orgs/community/discussions/13836
• https://stackoverflow.com/questions/74128344/github-protected-branch-hook-declined-even-with-allow-force-pushes

Thus we need to approve pull request created by github actions.