thermal/core: Remove unused macro THERMAL_TRIPS_NONE

The macro THERMAL_TRIPS_NONE is no longer used, remove it.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Thara Gopinath <thara.gopinath@linaro.org>
Link: https://lore.kernel.org/r/20201214233811.485669-6-daniel.lezcano@linaro.org

include/linux/thermal.h

@@ -17,7 +17,6 @@
 #include <linux/workqueue.h>
 #include <uapi/linux/thermal.h>
 
-#define THERMAL_TRIPS_NONE	-1
 #define THERMAL_MAX_TRIPS	12
 
 /* invalid cooling state */