Remove incorrect device check in LCN events

[alengwenus]

Proposed change

Removal of a check in the LCN event logic as to whether the calling devices are known to the integration.
The check is not necessary and might lead to unwanted behaviour when events are called.

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 #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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