Remove not used constant in climate (home-assistant#147041)

Author: gjohansson-ST

homeassistant/components/climate/__init__.py

@@ -105,11 +105,6 @@
 
 CONVERTIBLE_ATTRIBUTE = [ATTR_TEMPERATURE, ATTR_TARGET_TEMP_LOW, ATTR_TARGET_TEMP_HIGH]
 
-# Can be removed in 2025.1 after deprecation period of the new feature flags
-CHECK_TURN_ON_OFF_FEATURE_FLAG = (
-    ClimateEntityFeature.TURN_ON | ClimateEntityFeature.TURN_OFF
-)
-
 SET_TEMPERATURE_SCHEMA = vol.All(
     cv.has_at_least_one_key(
         ATTR_TEMPERATURE, ATTR_TARGET_TEMP_HIGH, ATTR_TARGET_TEMP_LOW