console: T3334: remove unused directories imported from vyos.defaults (backport #3923)

[mergify]

Change Summary

Remove unused directories imported from vyos.defaults

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T3334

Related PR(s)

• system: op-mode: T3334: allow delayed getty restart when configuring serial ports #3698

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

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This is an automatic backport of pull request #3923 done by [Mergify](https://mergify.com).

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

❌
warning: Unused directories imported from vyos.defaults in src/conf_mode/system_console.py:25.