Remove duplicate UPnP info in ssdp

[epenet]

Breaking change

In HomeAssistant release TBC (PR #59931), UPnP discovery data was made available in discovery_info[ATTR_UPNP][xxx].
Access via discovery_info[xxx] was since deprecated and has now been removed.

Proposed change

As a follow-up to #59931, the duplicated UPnP discovery data is removed.

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)
• 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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Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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[epenet]

No longer needed.