thermal: int3403: remove unused struct 'int3403_performance_state'

'int3403_performance_state' has never been used since the original
commit 4384b8fe ("Thermal: introduce int3403 thermal driver").

Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/thermal/intel/int340x_thermal/int3403_thermal.c

@@ -25,17 +25,6 @@ struct int3403_sensor {
 	struct int34x_thermal_zone *int340x_zone;
 };
 
-struct int3403_performance_state {
-	u64 performance;
-	u64 power;
-	u64 latency;
-	u64 linear;
-	u64 control;
-	u64 raw_performace;
-	char *raw_unit;
-	int reserved;
-};
-
 struct int3403_cdev {
 	struct thermal_cooling_device *cdev;
 	unsigned long max_state;