Style: Replace header guards with #pragma once

main/main.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef MAIN_H
-#define MAIN_H
+#pragma once
 
 #include "core/error/error_list.h"
 #include "core/os/thread.h"
@@ -102,5 +101,3 @@ public:
 	if (run_test) {                                                \
 		return return_code;                                        \
 	}
-
-#endif // MAIN_H

main/main_timer_sync.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef MAIN_TIMER_SYNC_H
-#define MAIN_TIMER_SYNC_H
+#pragma once
 
 #include "core/config/engine.h"
 
@@ -161,5 +160,3 @@ public:
 	// advance one frame, return timesteps to take
 	MainFrameTime advance(double p_physics_step, int p_physics_ticks_per_second);
 };
-
-#endif // MAIN_TIMER_SYNC_H

main/performance.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef PERFORMANCE_H
-#define PERFORMANCE_H
+#pragma once
 
 #include "core/object/class_db.h"
 #include "core/templates/hash_map.h"
@@ -138,5 +137,3 @@ public:
 };
 
 VARIANT_ENUM_CAST(Performance::Monitor);
-
-#endif // PERFORMANCE_H

main/steam_tracker.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef STEAM_TRACKER_H
-#define STEAM_TRACKER_H
+#pragma once
 
 #if defined(STEAMAPI_ENABLED)
 
@@ -70,5 +69,3 @@ public:
 };
 
 #endif // STEAMAPI_ENABLED
-
-#endif // STEAM_TRACKER_H