Remove unneeded attributes

[brg468]

Discussed in https://github.com/SecKatie/ha-wyzeapi/issues/373 a long time ago, State and Available as extra attributes is redundant and not needed.

This may be a breaking change if anyone was using those attrs in an automation, but HA already provides this info natively.

Will revisit device model and MAC later on, device model is already shown on the device page, MAC can be but currently isn't.