Change state_information to return feature values (#804)

This changes `state_information` to return the names and values of
all defined features.
It was originally a "temporary" hack to show some extra, device-specific
information in the cli tool, but now that we have device-defined
features we can leverage them.

kasa/iot/iotbulb.py

@@ -2,7 +2,7 @@
 import logging
 import re
 from enum import Enum
-from typing import Any, Dict, List, Optional, cast
+from typing import Dict, List, Optional, cast
 
 try:
     from pydantic.v1 import BaseModel, Field, root_validator
@@ -462,23 +462,6 @@ class IotBulb(IotDevice, Bulb):
         light_state = {"brightness": brightness}
         return await self.set_light_state(light_state, transition=transition)
 
-    @property  # type: ignore
-    @requires_update
-    def state_information(self) -> Dict[str, Any]:
-        """Return bulb-specific state information."""
-        info: Dict[str, Any] = {
-            "Brightness": self.brightness,
-            "Is dimmable": self.is_dimmable,
-        }
-        if self.is_variable_color_temp:
-            info["Color temperature"] = self.color_temp
-            info["Valid temperature range"] = self.valid_temperature_range
-        if self.is_color:
-            info["HSV"] = self.hsv
-        info["Presets"] = self.presets
-
-        return info
-
     @property  # type: ignore
     @requires_update
     def is_on(self) -> bool: