thermal: cpu_cooling: remove unused symbols on cpu_cooling.h

Remove defines that are not in used.

Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Acked-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

include/linux/cpu_cooling.h

@@ -27,9 +27,6 @@
 #include <linux/thermal.h>
 #include <linux/cpumask.h>
 
-#define CPUFREQ_COOLING_START		0
-#define CPUFREQ_COOLING_STOP		1
-
 #ifdef CONFIG_CPU_THERMAL
 /**
  * cpufreq_cooling_register - function to create cpufreq cooling device.