Revert atttibute-change after updating to Smile v0.2.12

Author: bouwew

custom_components/plugwise-beta/climate.py

@@ -161,8 +161,7 @@ def device_state_attributes(self):
         """Return the device specific state attributes."""
         attributes = {}
         if self._schema_names:
-            if len(self._schema_names) > 1:
-                attributes["available_schemas"] = self._schema_names
+            attributes["available_schemas"] = self._schema_names
         if self._selected_schema:
             attributes["selected_schema"] = self._selected_schema
         return attributes