Remove future import to fix broken typing.get_type_hints call

[cdce8p]

Proposed change

Refs:

• Use PEP 695 misc #117788 (comment)
• Reinstate typevar variable for config_validation helper #117829

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
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• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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[frenck]

Thanks, @cdce8p 👍

../Frenck