Remove connection status state.

[aequitas]

Current implementation of connection status doesn't follow convention and is not properly configurable. Might be added again in the future as a full fledged entity or some other way.

For now users can rely on error logging to determine connection status.

[mention-bot]

@aequitas, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fabaff to be a potential reviewer.

[genestealer]

@aequitas
That is a real a shame, as I found this very handy to know at a glance if the RFLink gateway was connected. Especially as mine is remotely located and routed via esp-link wifi serial.

Would it be possible to expose this information on the component to a sensor can be attached to it?

I was using a binary sensor, which took hours to get working (with help from the https://community.home-assistant.io/t/template-binary-sensor-help-solved/13101/5), to give a nice front end:

binary_sensor:
 - platform: template
   sensors:
     rflink_status:
       friendly_name: 'RFLink Gateway Status'
       device_class: 'connectivity'
       value_template: "{% if is_state('rflink.connection_status', 'connected') %}true{% else %}false{% endif %}"

[aequitas]

@genestealer the idea spawned after seeing your setup. I will have to see if I can bring it back as a full fledged state entity.