aidl: light: Use pragma once

Change-Id: I517d22da79659803c1271f79cb089710efbeba2f
diff --git a/include/samsung_lights.h b/include/samsung_lights.h
index 446a5de..f37fec9 100644
--- a/include/samsung_lights.h
+++ b/include/samsung_lights.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 The LineageOS Project
+ * Copyright (C) 2020-2022 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef SAMSUNG_LIGHTS_H
-#define SAMSUNG_LIGHTS_H
+#pragma once
 
 /*
  * Board specific nodes
@@ -26,5 +25,3 @@
  */
 #define PANEL_BRIGHTNESS_NODE "/sys/class/backlight/panel/brightness"
 #define PANEL_MAX_BRIGHTNESS_NODE "/sys/class/backlight/panel/max_brightness"
-
-#endif  // SAMSUNG_LIGHTS_H