Style: Replace header guards with #pragma once

scene/resources/bone_map.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef BONE_MAP_H
-#define BONE_MAP_H
+#pragma once
 
 #include "skeleton_profile.h"
 
@@ -64,5 +63,3 @@ public:
 	BoneMap();
 	~BoneMap();
 };
-
-#endif // BONE_MAP_H