replace include guards with pragma once

src/lighting/LightSolver.hpp

@@ -1,5 +1,4 @@
-#ifndef LIGHTING_LIGHTSOLVER_HPP_
-#define LIGHTING_LIGHTSOLVER_HPP_
+#pragma once
 
 #include <queue>
 
@@ -27,5 +26,3 @@ public:
     void remove(int x, int y, int z);
     void solve();
 };
-
-#endif // LIGHTING_LIGHTSOLVER_HPP_

src/lighting/Lighting.hpp

@@ -1,6 +1,4 @@
-#ifndef LIGHTING_LIGHTING_HPP_
-#define LIGHTING_LIGHTING_HPP_
-
+#pragma once
 #include "typedefs.hpp"
 
 class Content;
@@ -27,5 +25,3 @@ public:
 
     static void prebuildSkyLight(Chunk* chunk, const ContentIndices* indices);
 };
-
-#endif /* LIGHTING_LIGHTING_HPP_ */

src/lighting/Lightmap.hpp

@@ -1,5 +1,4 @@
-#ifndef LIGHTING_LIGHTMAP_HPP_
-#define LIGHTING_LIGHTMAP_HPP_
+#pragma once
 
 #include "constants.hpp"
 #include "typedefs.hpp"
@@ -86,5 +85,3 @@ public:
     std::unique_ptr<ubyte[]> encode() const;
     static std::unique_ptr<light_t[]> decode(const ubyte* buffer);
 };
-
-#endif // LIGHTING_LIGHTMAP_HPP_