Remove operating binary_sensor from Enphase

[cgarwood]

Proposed change

Remove the operating binary_sensor from the Enphase Envoy component. In Envoy firmware v8 this data is no longer available through the API.

This binary sensor has only ever been in dev, so I don't believe it would classify as a breaking change.

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[home-assistant]

Hey there @bdraco, @dgomes, @joostlek, mind taking a look at this pull request as it has been labeled with an integration (enphase_envoy) you are listed as a code owner for? Thanks!

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[joostlek]

Can't we make this only available for <8?

[bdraco]

Can't we make this only available for <8?

We don't know if it actually does anything for 7 so probably best to remove it so we don't have a breaking change later

[cgarwood]

Yeah, it seems like a pretty narrow window of systems it is actually available for (Firmware 7 with Enpower/IQ system controller and Encharge batteries) so figured best to just scrap it.