Adjust color mode handling in esphome lights (home-assistant#162294)

Author: epenet

homeassistant/components/esphome/light.py

@@ -299,7 +299,6 @@ def brightness(self) -> int:
         return round(self._state.brightness * 255)
 
     @property
-    @esphome_state_property
     def color_mode(self) -> ColorMode:
         """Return the color mode of the light."""
         if not self._supports_color_mode: