Cleanup devices in Nord Pool from reconfiguration

[gjohansson-ST]

Proposed change

Clean up devices (services) and entities from a reconfiguration of the config entry.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
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• 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)
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• This PR fixes or closes issue: fixes #
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[zweckj]

Suggested change

	entities = er.async_entries_for_device(entity_reg, entry.id)
	for _entity in entities:
	entity_reg.async_remove(_entity.entity_id)

entities will be cleaned up automatically once the config entry is removed from the device. The below code is preferred because other integrations might be connected to the same device

[gjohansson-ST]

The below code is preferred because other integrations might be connected to the same device.

The other method uses async_update_device but I guess there is some reason why it exists, but I'll take a look at that some other time.

[home-assistant]

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