Fix translations for binary sensors in System Bridge (home-assistant#…

…110095)

* Add translation keys for binary sensor names

* Update version_available string in system_bridge component

* Remove unused code in SystemBridgeBinarySensor class

* Restrict SystemBridgeBinarySensorEntityDescription name type to str

* Refactor binary sensor entity descriptions and remove unused translation keys

homeassistant/components/system_bridge/binary_sensor.py

@@ -23,10 +23,6 @@
 class SystemBridgeBinarySensorEntityDescription(BinarySensorEntityDescription):
     """Class describing System Bridge binary sensor entities."""
 
-    # SystemBridgeBinarySensor does not support UNDEFINED or None,
-    # restrict the type to str.
-    name: str = ""
-
     value: Callable = round